We are beginning the process of having our first pool built and need some advice on the pump. I noticed a discrepency in the contract and the plans. The plans say that a 1.5 HP is going to be put in but, the contract says a 2.0 HP. I don't know if this makes a huge difference or not. Does my pool need a 2.0? Am I going to save on electricity with either? The PB is coming by today and I don't know weather I should push the issue not or. Please advise...