I have been through the archives, and studied heat pump info til my eyes are crossed. I was wondering if any of u know which heat pump is best for a round 24 foot above ground pool, with vinyl liner. I am in Northeastern NC, where summers are very warm, but Spring and fall can be quite chilly. I would be happy if i could extend my swim season from 6 months (April-September) to around 8-9 months...(thinking perhaps March-October/November). I have solar heat on my pool, and keep a solar cover on it whenever it is not being used, except in the hottest part of summer. I need a good heat pump, but know nothing about how many BTUs to look for, which ones are most dependable, etc. I DO know i want one with a titanium heat exchanger. Any ideas? I'd like to get the "most" for my money. I guess i need to buy one with the highest BTU rating that I can afford right? I really practically LIVE to swim, but this is all so confusing! Thanks in advance for any advice.