I am looking for a surround sound system for my father. It has to be very user easy in operation. He has a new Mitsubishi WS-65819 TV, Dishnetwork 6000 HD Receiver and a Panasonic RP91K DVD Player. It all works well, and I set it up to be as easy as possible to use. My concern is that if I add a conventional receiver with Surround Sound, Dolby Digital, THX that it will dramatically increase the complexity of use since he will need to power up, and change sources on another piece of equipment. I know this sounds rather trivial, but right now I have him operating on his technical edge. Any suggestions?