I am building a house and am getting a house system, as well as putting my theatre stuff in a rack. I am going over the quote line by line (for about the 3rd time) and have just realized that I may not need a seperate tuner. I have a Sony ES rec'r and will be using the Russound 6 zone house system. Why would I need a seperate tuner and the tuner from my rec'r? Is this so I can use my rec'r for the main room and then tuner for the Russound other areas?