I am looking for a sub to go with my M60s, QS$, and VP-100 setup.
First, do you guys think I need a sub? To me, the setup it sounds very crsip and accurate but the bass response is not terribly powerful. My "theatre" room is roughly 20 x 12 x 8. We usually listen to way more music than watch movies so I am mostly interested in subs that can reproduce music accurately. I am not looking for big booms that are overdone. Searching the forums it sounds like Hsu and Velodyne are good ones to look at. What about Axiom, Aperion? I am avoiding mass market (Polk, JBL, Infinity, etc) but maybe there is a gem in there?
Your thoughts and collective experience is appreciated.

Thanks
Mark

AV equipment (in case you care)Panasonic TH-50PE700U,PS3 80GB,HK 445,Axiom M60,QS4,VP100,Hsu VTF2.3