Our current pool pump (Emerson Motors 1HP 1081 K63CXERN-4780) is slowly leaking water from somewhere on it's bottom. Since I was planning to replace it with a more efficient model, I figured now is the time to do this and was hoping for some advice on a replacement. Our pool holds about 20,000 gallons (75,000 litres), has 4 return jets (2 on stairs), 1 skimmer, 1 drain, 1 vacuum line, has no special water features and uses a sand filter.

The two main qualities I'd like in a new pump are efficiency and quietness. Based on this, and after reading various threads in the forum, I came up with the following options:

-Pentair Intelliflo

-Pentair Whisperflo

While I was attracted to the Intelliflo because of its efficiency, quietness and built in programmability, it looks like its higher cost wouldn't be justified given our local electrical rates (.65kwh to .10/kwh TOU). Therefore, I'm now thinking about the Whisperflo, but there are 35 Whisperflo models listed on the Pentair website! Based on what I've read, it sounds like we would want Dual Speed, which narrows it down to 8 models, but I still need to figure out the following:

1) Full rated vs Up rated

2) HP (.75, 1, 1.5, 2)

Any help selecting the model to buy would be much appreciated.

Thank you