That's a spectacular lineup you have there, and I'm envious of those who are attending.
Note to Luke - the warning about your house is legit.
You might already know this, but --
At the 2012 KC Blind Sub Shootout we trashed:
A) My Epson 8350 Projector (color grid was knocked out of alignment - the left and right edges of the projector were off color - I sent it back under warranty)
B) My Theater room's PC bluray drive (failed during meet - would not play nor record blurays post meet, replaced under warranty)
C) My Xbox HD-DVD drive (would not work post meet - not replaced)
D) My drywall (loosened and rattles/buzzes post meet at much much less volume - not replaced)
E) My upstairs kitchen tile grout (cracked pretty much everywhere --- that's the one that irked the wife - not fixed yet)
Some of the guys went upstairs during the demo and said the wooden floor directly above the theater room was heaving up and down like waves. I believe it after seeing all the cracked grout in the kitchen.
It was worth it to experience the insanity of the dual Orbit Shifters at full bore (we measured 135~dB peaks with the omnimic in the back of the room at about 17 feet away from the subs). The front of my room at the listening position typically measures about 7dB hotter. These types of subs can and will damage your home at full tilt. The Gjallerhorn should also be able to tear some mess up.
It was truly like listening to car audio levels of bass in a 3500 cubic foot home theater room. Absolutely obscene. It was not just your pant leg shaking it was your clothes vibrating - it was your skin and hair tingling. After the short max volume demo my skin felt agitated/excited - almost like all my skin had fallen asleep, or been exposed to high winds or something. Those in the front of the room said the Orbit Shifters were nearly controlling their breathing. It was Awesome!
If you don't break something at this meet with this lineup - you've done it wrong