We had some electronic revamp work done on our 2012 Newmar Mountain Aire by OCRV in Anaheim. Owner is Art, phone 949-244-3033
They installed (2) new TV's, 5.1 surround sound, and a new Direct TV dish and receiver. They did an excellent job of matching the existing cabinet wood work in color and texture when reworking the TV cabinets, and the finished installation looks better than Newmar did at the factory.
I've also used them for other electrical work including installing LED's in the awnings and repairs such as replacing slide motors.
Not the cheapest, but the quality is there.