... I think you should not get hung up on chassis a or b.
If the mid door is what you need (want) and thats a deal breaker, then you really have put limits on your search. We have a Crescendo. But not mid door and love it. We traded a 2003 Bounder for it, and loved it. You may have to give something up, to get the best coach at the best price.
Again welcome....Peace D