i need to set up a new multi-zone audio/video system in my house. there is built-in speakers in three rooms (one TV room, two audio rooms upstairs). 3-zone amps/receivers are expensive. is there an option to buy a one-zone surround sound/video system (surround sound in a box) and then a separate 2-zone amp to power the audio zones upstairs. the audio zones have both built-in speakers and built-in wall controllers.