My junk Jensen 965 has made it through 5 camping seasons. We don't do a lot of DVD, s but do use it for Pandora and XM if no cell signal. Also use it with the Sat dish for tv. I keep waiting for it to take a dump but it just keeps on giving.
When it does stop working I'm going sound bar. Right now the sounds pretty decent. I replaced the 4 living room speakers with some cheap 3 ways. The originals were 1 way paper cones. My 5er did come with a nice wired sub woofer. It will rock pretty good on Pandora.
The best way that I would go is a sound bar and BluRay player. We don't use the out side speaker very often or the bedroom ones either. I have a Flip that I can use in remote areas that works pretty good.
It still amazes me that the RV business is so far behind the audio world. They just now offering Bluetooth with their stereos. I had to wire in a Belkin HD BT B17 so I could play Pandora through the stereo and not have my phone cabled to the Jensen.
Anyway to the OP's issue. Soundbar.