I started looking for a shorter RV (22') and like you came to the conclusion that the wife and I would need a longer RV. We wanted a bed that we did not have to climb up to for us. We wanted a high CCC weight (dog shows for her, dry camping for me). We wound up with a Lazy Daze mid bath. The two couches can be pulled together for a king size bed, but we generally leave a isle in the middle so we do not need to climb over each other in the night. If we are camping with a group of friends and need to we put the beds away and have an extra living room to have people over if it is real hot or the weather is to ugly to be outside.
As for you questions about quality. I look not only at the cabinets but more to the general construction for the house part of the rv, materials used, and the overall reputation of the manufacture has for long term durability when well cared for. Ron Dittmer has a very good entry that he posts often about roof construction.