Newbie here-----I am interested in purchasing either the RM7600 with the PSW650 or the 7200 with the PSW550. My room is 18 ft. by 13 ft. , and 8 ft ceilings, and it is not on a slab. The carpeted room only has three walls(where the fourth would be is open into the eat in dining room and kitchen). Of course I would obviously like the superior 7600 front, center, and surrounds, but I wonder if the PSW650 is too much bass for the room. I live in a nice neighborhood and I'm not looking to annoy any neighbors. Anyone out there have one of these systems or anyone else who can help?