Depending on how big your room is and where you are you could get a HSU STF-2 from Comp USA (so I've heard) for $349. A much, much better sub. Do a search in the forums here, you'll see other people will agree.

2xM80 VP180 2xQS8 2xM3 HSU STF3 LG 60PS11 Denon 3808 ATI 1506 LCR 2xATI 1502 Oppo BDP-83