My system is under construction, primarily for Music, then Movies. The room is 17Ft (Plus a bay window turned into a giant bass trap) by 15.5 Feet and 8 ft tall ceiling. I am Upgrading to 11 Channel 1723 THX system. I have AVM 60 and Parasound 400 Watts per channel @ 4 Ohms. I also have 4 SB 4000 Subs.