We are thinking seriously of parking our present 30ft TT permanently and getting a
Sonic SN190VTB TT to travel around the country with. I think it meets most, if not all, of your requirements.
You can get it with a murphy bed that folds down over the couch (that is quite comfortable by the way). It has plenty of counter space in the rear bathroom for putting shaving needs down, and also has a fairly roomy corner shower.
I was very impressed with the one I saw last year at the local RV show. Might be worth your taking a look.
Barney