Been paying a lot of attention to this since I will be ordering a 37FS in mid-December. In addition/addendum to what is mentioned in this post:
1. The seats are more plush and are air ride. To me, they look identical to the seats in the DYNAMAX DX3.
2. The rear ladder is history, not even an option.
3. The in-dash JBL has been replaced with the Pioneer AVH-4200NEX. Very nice unit IMO.