Many of the higher quality audio systems that run around the same price as the new concertone stuff can play dvd's, cd's, cd-r's, cd-rw's, etc and have outputs specific for subs, amps, tv's etc. I usually take a look at the crutchfield dot com site and find one i like and then google the model number to find the best price on it. But, crutchfield does offer assistance and advice with every purchase in the event u run into problems. Only thing is that they won't have wiring diagrams for r.v.'s, but they do for almost every vehicle out there.
Where we've been:
2000 Rockwood Roo M-18 Hybrid
2006 Dodge Ram 2500 Auto 5.9 Diesel
Gone but not forgotten -1986 Rockwood 1003 PUP