Best demo disc for sub-woofer is Live Free or Die hard. When I play this, guests ask me if I have something wired to vibrate the couch. I do not -- it is the subwoofer shaking the room. The great thing about this soundtrack is that there are rapid fire bursts that really demonstrate the capability of a quick and articulate sub-woofer. It'll have your shirt flapping!
I'm not a fan of the Police: Certifiable. Yes, it does have lo end for your sub-woofer, but it is the dull thump kind, not well articulated bass.