Yeah... I have also been thinking about the pump. Saw this today as I was searching...
http://www.inyopools.com/Products/07501352062872.htm. Not sure yet.
The spa is stand alone. There are two suction lines... one from the skimmer and one from the main drain, I run them both wide open. What's the advantage of a 3-way valve over putting 2-way valves back in?
On the pressure side, I think that I'm going to take out the chlorinator. I don't use it since converting over to the TFP methods.
There are 3 lines on the pressure side... one going to the two jets, one going to the Polaris (come back to that in a minute), and one going to a line for the slide that is no longer there and the line is capped off.
Regarding the Polaris, it works fine with the single speed pump... if I switch to a 2-speed, then I'm going to have to get a booster pump... so will I really be saving any electricity? That leads to the next obvious money spending thought - replace the Polaris with a robot. But I haven't been able to convince myself to drop a thousand bucks or more into the pool right now (between the robot and a new pump) - I want a new mountain bike first