I have narrowed it down to 2 PB , 1 comes very recommended by a neighbor is very personable so far, we will call him PB A and pool builder B (is local) has a great reputation in the area (but is set in his ways). PB A is a independent that works out of his home(mansion) in Friendswood TX(about 40 miles away from my home) seems very knowledgeable, no website only works on referrals, is telling me to go chlorine, manual timers, do not need a VS pump is using all pentair with cart. filter. PB B is using pentair salt,DE filter, Ozone, automation, VS pump for about 2500K more than PB A. this is for a 17K gallon pool and spa. all other choices seem to mesh with each others quotes. I am still torn between the two. The design is very similar in all aspects as far as decking, PB A uses 4" drains and PB B uses channel drains. What are the go to questions to help me select a PB?