I am curretnly running my system on a Yamaha RXV-620 with a Boston VR910 center channel, crappy old Kenwood mains (I know, I need to match), crappy Radio Shack surrounds, but no subwoofer. I want to at least add the .1 to my 5.1 before I upgrade my other speakers. My room is roughly 14 X 11 with hardwood floors and neighbors downstairs. Any suggestions on a $300-$500 subwoofer. My local Tweeter sells Bostons and Klips, my Best Buy has the standard CSW and JBL's.....any ideas?