If you have a 1080 HD TV then whatever you buy get it with a HDMI output from the radio/DVD unit.
You will get the best quality picture that way when playing DVD's. This is the unit that came in my Jayco. It has a HDMI output. Not crazy about the remote but it has a audio input also.
I ran a cord with a 3.5mm plug on 1 end into the TV's audio output, and the other end of the cord with RCA plugs, R/W in to the stereo's audio input. Select AUX mode on the stereo and play your TV audio thru your ceiling speakers.
All this depends on what TV you have. I installed a 40 inch Samsung with the needed jacks and connections.
You could possibly go the car stereo route. Crutchfield is the best place to get info, great service and willing to talk on the phone with no pressure.
Good luck on your search.
Crutchfield: Car Stereo, Speakers, Home Theater, Pro Audio, 4k TV