I'm late to the party, but +1 for the subs that have been mentioned.

The receiver or preamp/amp combo has less to do with the sound you hear than the speakers do.

This was one of my first lessons learned on the Axiom boards.

It has been more valuable than every other lesson except for "Don't ride in a car with Peter B. after he's eaten chili."

Bears, beets, Battlestar Galactica.