Looking for a Class A DP without paint checking

Looks like your list of requirements are "right on". I would agree the hydronic heat is a plus, or even a must for full time, but I wasn't aware a big advantage was the endless shower. Did you run out of hot water with your old one? Mine is an LP tank and I guess we've never actually ran out of hot water so I never would have thought of hydronic as a plus for that specific reason.