I'll let others speak to quality, but something important is floorplan, and what you intend to do with the coach. How often do you use it, how many people you need to actually sleep on a regular basis (kids?) and if you are always in campgrounds with hookups, or if you dry camp (so no external power and water)... all these play a big part in what's "best" for you specifically!
The Green Machine -- 2000 Mountain High Coachworks Summit (Spartan chassis / Cummins ISC)
...and F-Troop: Fearghus, Fiona, and Frankie (Cairn Terriers)