We are having our pool installed next week. We didn't get a heater yet but are thinking we may want one. The place we bought the pool sells Hayward 150FDN (we need 150,000 btu) natural gas heater. Of the reviews I've seen for Hayward, they aren't the best but I don't see any for this exact one. Any suggestions? We live in IL so it would surely extend our pool season. Also - if we end up with a SWG down the road, are there heaters better for working with salt water?