You need to be careful what you classify as medium vs high head. For example, the two pumps that you suggested, TriStar (SP3205EE) and Super II (SP3005X7AZ), have head curves similar to the Superpump SP2607X102S and all have lower head curves than the SP2610X15 which is what I think the PB was suggesting. The Tristar even has close to the same max head as the Superpump so those are very similar except that the TriStar has a higher efficiency, albeit single speed, motor. But other than that there is very little difference between these two pumps.
msera1, I don't have all of the details about your plumbing but just from what you have posted plus filling in some of the unknowns with typical setups, here are the operating points for three of the pumps (SP2610X152S, SP2607X102S & SP3205EE) and two plumbing sizes (1.5" and 2") with solar engaged. Note that you gain about 30% in efficiency when going to a larger pipe size. Also, note that Superpump is less efficient than the Tristar but that does not take into account that the Superpump can run on low speed where as the Tristar cannot. Your overall efficiency will depend on how much run time will be at low speed vs high speed. Also keep in mind that since I don't have all of the details of your setup, your results may vary.
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Summary
[/td:1qwowx9f][td:1qwowx9f]
[center:1qwowx9f]SP2610X152S - 1.5"[/center:1qwowx9f]
[/td:1qwowx9f][td:1qwowx9f]
[center:1qwowx9f]SP2607X102S - 1.5"[/center:1qwowx9f]
[/td:1qwowx9f][td:1qwowx9f]
[center:1qwowx9f]SP3205EE - 1.5"[/center:1qwowx9f]
[/td:1qwowx9f][td:1qwowx9f]
[center:1qwowx9f]SP2610X152S - 2"[/center:1qwowx9f]
[/td:1qwowx9f][td:1qwowx9f]
[center:1qwowx9f]SP2607X102S - 2"[/center:1qwowx9f]
[/td:1qwowx9f][td:1qwowx9f]
[center:1qwowx9f]SP3205EE - 2"[/center:1qwowx9f]
[/td:1qwowx9f][/tr:1qwowx9f][tr:1qwowx9f][td:1qwowx9f]
Pump Speed (rpm)
[/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]3450[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]3450[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]3450[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]3450[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]3450[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]3450[/center:1qwowx9f][/td:1qwowx9f][/tr:1qwowx9f][tr:1qwowx9f][td:1qwowx9f]
Water Flow (gpm)
[/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]51.8[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]48.8[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]49.7[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]68.4[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]64.7[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]67.4[/center:1qwowx9f][/td:1qwowx9f][/tr:1qwowx9f][tr:1qwowx9f][td:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f][/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f][/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f][/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f][/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f][/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f][/center:1qwowx9f][/td:1qwowx9f][/tr:1qwowx9f][tr:1qwowx9f][td:1qwowx9f]
Suction Head Loss (ft)
[/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]3.3[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]3.0[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]3.0[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]2.2[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]2.0[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]2.1[/center:1qwowx9f][/td:1qwowx9f][/tr:1qwowx9f][tr:1qwowx9f][td:1qwowx9f]
Pad Head Loss (ft)
[/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]10.8[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]9.6[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]10.0[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]12.5[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]11.2[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]12.2[/center:1qwowx9f][/td:1qwowx9f][/tr:1qwowx9f][tr:1qwowx9f][td:1qwowx9f]
Solar Head Loss (ft)
[/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]27.9[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]25.0[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]25.8[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]15.6[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]14.1[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]15.2[/center:1qwowx9f][/td:1qwowx9f][/tr:1qwowx9f][tr:1qwowx9f][td:1qwowx9f]
Return Head Loss (ft)
[/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]7.9[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]7.0[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]7.3[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]4.2[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]3.8[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]4.1[/center:1qwowx9f][/td:1qwowx9f][/tr:1qwowx9f][tr:1qwowx9f][td:1qwowx9f]
Jet/Eyeball Head Loss (ft)
[/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]0.5[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]0.5[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]0.5[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]1.0[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]0.9[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]1.0[/center:1qwowx9f][/td:1qwowx9f][/tr:1qwowx9f][tr:1qwowx9f][td:1qwowx9f]
Total Head Loss (ft)
[/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]50.4[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]45.0[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]46.5[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]35.6[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]31.9[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]34.6[/center:1qwowx9f][/td:1qwowx9f][/tr:1qwowx9f][tr:1qwowx9f][td:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f][/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f][/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f][/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f][/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f][/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f][/center:1qwowx9f][/td:1qwowx9f][/tr:1qwowx9f][tr:1qwowx9f][td:1qwowx9f]
Input Power (Watts)
[/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]1372[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]1178[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]1027[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]1408[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]1212[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]1076[/center:1qwowx9f][/td:1qwowx9f][/tr:1qwowx9f][tr:1qwowx9f][td:1qwowx9f]
Energy Factor (Gallons/Watt-hr)
[/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]2.26[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]2.49[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]2.90[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]2.92[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]3.20[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]3.76[/center:1qwowx9f][/td:1qwowx9f][/tr:1qwowx9f][tr:1qwowx9f][td:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f][/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f][/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f][/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f][/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f][/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f][/center:1qwowx9f][/td:1qwowx9f][/tr:1qwowx9f][tr:1qwowx9f][td:1qwowx9f]
Suction (in hg.)
[/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]2.9[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]2.6[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]2.7[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]1.9[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]1.7[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]1.9[/center:1qwowx9f][/td:1qwowx9f][/tr:1qwowx9f][tr:1qwowx9f][td:1qwowx9f]
Filter Pressure (psi)
[/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]18.7[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]16.6[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]17.2[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]12.9[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]11.5[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]12.5[/center:1qwowx9f][/td:1qwowx9f][/tr:1qwowx9f][tr:1qwowx9f][td:1qwowx9f]
Panel Input Pressure (psi)
[/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]5.69[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]4.15[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]4.58[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]2.40[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]1.26[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]2.09[/center:1qwowx9f][/td:1qwowx9f][/tr:1qwowx9f][tr:1qwowx9f][td:1qwowx9f]
Panel Output Pressure (psi)
[/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]3.41[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]1.88[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]2.30[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]0.04[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]-1.09[/center:1qwowx9f][/td:1qwowx9f][td:1qwowx9f][center:1qwowx9f]-0.27[/center:1qwowx9f][/td:1qwowx9f][/tr:1qwowx9f][/table:1qwowx9f]