We also moved from a Class A to a Class B. We have a 2001 Roadtrek 190, which is considerably smaller than the newer Sprinter-sized rigs. For us, it's just right.
The best thing for us is the spontaneity it allows. We drive it as a second vehicle as well as RV, so it gets used all the time. No more needing reservations, as we can go anywhere, park anywhere, and stay at any sized campsite. The only caveat I've heard about so far is multiple days at one site. If you travel and want to return, you'll want to put out some type of marker to save your site.
Hope you find what you want soon!