I'm also considering a 2-speed pump and wondering if there is a substantial difference between brands. Is there any reason not to go with whichever brand of pump is cheapest? Are they all reliable? Why would I buy a Pentair 1hp 2-speed for $479.00 instead of this company's 1hp 2-speed for $335.00?

http://www.electricmotorwarehouse.com/pool_pumps.htm