If you guys are looking for subs, stroll on over to the subwoofer forum. I did, and found out a couple of things. These are broad generalizations based on what I read for a few weeks:
$400 or so subs are a good place to be. Primarily in that space, you want SVS or HSU, nothing else in that price range even comes close. And I was heading that way myself, until the great deal on the Mirage S-12 started at Vanns.com. $800 sub for $400. This one, by specs and all reviews/accounts, competes on pretty equal footing with the SVS and HSU $400 or so offerings. I went for the Vanns deal, got my S-12, and it is AWESOME. I absolutely love it for both movies and music. I will never go back to a "normal" sub again. I'm running Rti12's off a pro-amp, csi3 center, rti4 surrounds, and lousy sony speakers for my 6th and 7th. I use a Denon 3805 AVR.
I haven't heard the SVS or HSU, so I can't comment on those, but encourage you to do some reading in that forum. It kept me from making a mistake in my purchase.