I would have to say that if you had asked about either of the 23 foot models, I would have given the same response.
The bed in the 22 is a really great size, and very comfortable bed. It measures 54 x 80 in our model. Wonderful bed.
I would not be happy for the 2 of us sleeping in the 48 inch wide bed in the 23D. (that is the same size bed found in the 16, 19, 20, and 23 D).
The 23 FB has a nice large bed, but you are then into the same issue as the 22 sport, with not being able to sleep 2 adults on the folded down dinette.
If you are truly wanting an model for 4 adults I would unfortunately recommend a 25.