Well, what I did is use 2 receivers. But only because I had 2 laying around from my periodic upgrade bug I keep catching. So I have one that runs living room speakers and another for the patio speakers. They are both tied into the same source, dish TV receiver, but this way I can turn them on and off independantly. I can't imagine when I would want music outside and news or tv or something inside so it works for me to have them tied together. One of the receivers has a/b speaker outpts so that one also adds speakers to my game room. If were having a get together we can have music playing everywhere which is pretty nice.
If you're look at home theater in a boxes you may not find an a/b spaker option, but most stand-alone receivers have that option anymore.