Personally, I would still put it under the TV. That way the voices will sound like they are coming directly from the actor's mouths. Having said that-- the Sonos has a very nice system built in where it will "tune" your speakers based on the room you are in. It uses the App on your Smart Phone to do the tuning, which makes you walk around the room for a few minutes holding the phone up with its microphone. I didn't notice a HUGE difference when doing this in my own home, but there was definitely enough difference that I could tell something had changed. The surround was just better aimed and seemed to be timed better.