If you have the room, I have replaced the stereos in my past 3 campers with this one:
RV Stereo 12 Volt EV Wall Mount Bluetooth CD DVD Player Surround Sound Warranty | eBay
It is very similar to one of the newer $799 concert one stereo systems but at a fraction of the price.
I live mine and is why I just put one in not too long ago on my new camper.
Plays DVD movies
Has bluetooth to stream music from your phone or tablet to the stereo
Plays audio from TV thru stereo
3 speaker outputs (main room, bedroom, and outside)
TONS OF FEATURES AND OPTIONS VERY RELIABLE and easy to use.