I'm a novice and I'd like advice about surround sound speakers. The speakers are to be connected to a TV and should be wireless. I appreciate that the speakers will require power, so wont strictly be wireless. I don't need/want a full Home Cinema system, just speakers for the TV. What should I be looking for and is a 7.1 set up that much better than a 5.1 for connecting to a TV? Any advice/info would be much appreciated.