Dan, the radio we have, which is a Sanyo, came pre-installed with the RV. The dealer said he would reimburse us for the actual value of the radio, which is about $200, so we will most likely have a different brand installed on our own. The leak around the window seems to be ok since I caulked a wide gap at the top. I'm going to try the door leak myself also.
As far as handling, it does very well. Easy to drive, the power is exceptional. The size is comfortable and adequate for what we need. This is the first one I drove, and didn't do a lot of comparing. Not many dealers in our area for this type of unit, mostly they handle the class C's. In fact, this is the first B+ the dealer has handled, so it is somewhat experimental for them, too. Maybe in five years or so we'll look around a little more and see what's available. It does get annoying with these minor problems turning up, but I guess all in all, we are satisfied.