I am fairly new to Home Theater so my experience is a bit less robust than most of you who post here. I am more or less a lurker rather than a poster but read the forum daily.
My Subwoofer ownership experience has been limited to A couple of failed DIY sub builds as well as a pair of Klipsh KSW-12's.
I have heard almost every iteration of SVS (with the exception of the newer models) 1 DIY sonotube (tuned to 16hz), and a Velodyne DD15.
So as you can tell I am a bit of a newbie when it comes to "real" LFE devices.
I have to keep this review short due to the fact i've only been able to view about 10 scenes with the SubMersives. The most recent being the Lightning strike and Pod emergence from War of the Worlds. This has resulted in a Huge mess.... My projector completely came unaligned, one of the HVAC vents in the wall opposite the subs came out about 1" from the wall (it is an old house and a bad HVAC install), I dislodged an electrical outlet cover that wasn't secured, and dislodged one of my DVI plugs (not screwed in) coming into my computer on the 2nd floor. (That was at -5db on my pre/pro, reference is at 0db)
Oh and I don't belive i've felt that scared from a scene i've seen countless times.
The thing that amazes me the most about these Subs is their ability to convince you of the reality of the situation being displayed on screen. The Bass is accurate, not showy or boomy, and and no other sub I have heard has been able to accomplish this combination of Loud and Accurate.
Another tangible value that this sub offers is the man who created it, Mark Seaton. I don't' think i need to add another feather to Mark's cap as I'm sure its full already, but I am amazed at his depth of knowledge and passion for this industry. If you meet Mark, you will buy his products. They represent the future of Home Theater.
Bad Wallet! Bad Bad Wallet!