I would not have another multi-slide coach that had top hinged bay doors - the bays under the slides are a PITA to access if you don't have the cafe (side-hinged) doors.
Does it make a difference if they are under the slides? You bet. That's where the side hinge is most important (IMO).
All the rest are nice to have, but none of the rest would be a deal breaker for me - and I already have a raised rail chassis (surprise - it's a Freightliner) with IFS. I also have a Sani-con drain system, but I choose to use the portable model because much of the time I find the big 3" drain hose to be faster and more convenient.
Former owner of 2004 American Tradition and several other RVs
Home is in the Ocala Nat'l Forest near Ocala, FL
Summers in Black Mountain, NC