So i currently have a 14x28 3-6ft pool, and i want to get a heat pump for it, since everything i got is hayward i rather stay with them, now looking at their heatpump line their 140k btu heat pump is only $200 more than their 125k and they share the same COP which is $200 more than the next smaller one, my question is, is there a reason not to get their biggest heat pump (140k btu) and get a smaller one instead?