Hi all, our current Mastertemp 400 finally bit it after 14 years. Looking for recommendations on a replacement. Our pool is around 14000 gallons with a 800 gallon spillover spa. The same model heater looks to be around $2000- 2700, while Raypak is a lot cheaper for what seems like a comparable model. Is there a benefit to cupro nickel in a chlorine pool? I know I need a low nox model in Cali, but is 400k btu overkill? Thanks