re: Pool decking

Don't see anything wrong with that but obviously don't know price he's charging you. Jandy is what we use. I believe it's the best equipment available.
Look into the ozone/fusion system.
I will tell you that most people that build a sport pool (shallow, deeper in middle, then shallow again) tell me they regret it. Make sure that's what you want.
Are you doing any waterfall, water features, raised wall?