Dave, glad to see you made it over to this board. I have the same coach except for the engine. We have had nothing but good luck with our dealer and Gulf Stream on what few problems we have had. I would first contact GS and find out about the warranty, my feeling from past experiences they will have not problem in giving it to you, but remember most component parts are covered buy each manufacture and not GS.
The Aqua Hot is about a 6 to 7k option that most other manufacture's do not offer as std. in their top of the line coach and believe me its worth every penny. Over the first year you will have your share of little problems but that's par for the course with any new coach, but the longer you own it the more you'll learn all the little things GS does to make a better coach. Good luck and I hope you get it.
2007 42' Friendship Quattro
2007 Liberty Toad
Kids raised and only barrow money
400 Cummins Bad Milage