inserted is a picture of my living room/first floor plan. the room has a total 4120 cubic feet. I'm going to use 5 definitive technology 6 1/2 in ceiling speakers to give the surround feel, but need recommendations on what sub to use to give me the deepest, loudest bass. I was thinking the svs ultra 13 or the pb12 dual. any recommendations on what subwoofer i should go with to fullfil my room and desires? thanks much any help is greatly appreciated.