I have been looking at replacing the dual speed pump with a VS pump since we just got solar installed. I am wondering - between the various brands out there, from what I am seeing here, lots of folks seem to recommend the Pentair Intelliflo VS. Is this THE pump to get? The pool we have is 11,400 gallons, in ground, and we just installed solar (2 story house), with 7 panels. The solar installer says that in order to run the solar, we need to run our 2 speed pump on high. But, he said that if we upgraded to a VS pump, with controller, we'd see better electric bills.