Pentair makes great pumps, and are definitely worth looking at. I would check into either a 2 speed or a multi speed, both of which will save you money on your electrical consumption. Either way you decide to go, I would suggest you look at a 1 HP pump, as the 1 1/2 HP is too much pump for your pool (unless there is something going on beside just a pool that you aren't telling us :-D ).
The IntelliFlo pumps would be the ones you would look at for speed options, and the WhisperFlo would be the single speed option. Good luck!