Im planning on getting a pair of T6's for the front, and then running M6's for the center, side and rear for a 7.1 surround setup. The room is ~350sq ft. Since the T6's have 4 12" subs in each tower, would I need to add a sub to this system? Also, are there any better combinations I can run for sides and surrounds beside the M6's, I cant do wall mounts, so the L5's arent an option. Thanks.