Hi, im looking to upgrade my subwoofer drom yamaha ns-300 to either svs pb 1000 pro or pb 2000 pro. My current set up is denon x2700h receiver, polk signature s60 as mains, s30 as center and s10 as surround. My usage is 65% music and 35% movies. My room size is approx. 3100 cubic feet. Or 325 sq. ft. I listen at moderate volume level say between -20 to -15db.