My pool isn't but about 2 years old, but I have been seeing a lot about variable speed and 2 speed pumps being much more energy efficient that it is making me wonder if it would be worth my while to replace my pump. The PB put in a 2HP Jandy Plus HP pump (i believe it's the up-rated version, if i'm not mistaken). In any event, my pool has 2 standard returns plus a 2ft sheer descent for the returns plus 2 skimmers & main drain. I also have a spa with six jets. All pluming is 2inch. I am not sure what flow the sheer descent needs in order to push the water a decent distance from the raised beam, and so, I am not sure if I could run a 2 speed pump at Low or an Intelliflo in a lower range and have things both look and perform well. Based on the calculator on pentair's site, I theoretically could save about $450/year....which would mean 2 years or less in payback time. Thoughts?