With all the help and information from here, I think I have figured out the combination for my new pool (yet to actually be bought).
This equipment is for either an 18x40 (22,000 Gallons) or 18x45 (25,000 Gallons) oval 54" deep.
I do not know the actual head of the system since it isn't yet built, but I am assuming 30 for an AGP. I will be using 2" piping for the intakes and reserves. Turnover rate of about 6 hours with the 25,000 gallon pool, but for 12 hours with the two-speed on low speed.
Pentair System:3 Modular D.E. Filter - SMD series model S7MD60 (60 ft2 filter area) with an optimal performance of 60-90 GPM. On sale at inyopools.com for $399.99.
Pentair Dynamo Aboveground Pump Model DYNII-N2-1 two-speed and 1 HP motor with a 52 foot head max and at 20 foot head of 85 GPM rate. At Poolcenter.com for $249.97.
I appreciate any comments on this combination, especially those stating obvious errors or wrong assumptions.