Ditto the sub over new AVR suggestion. A $600 AVR won't change your enjoyment much, unless your current AVR is real crap. But a $600 sub can do wonders, even if you don't wake the neighbors.

Panny 3000 PJ, 118" Carada, Denon 3300, PS3, Axiom QS8, PSB 5T, B&W sub, levitating speaker wire