My living room is a full SVS Ultra setup, including a pair of the older SB13s. They've just generally been an excellent company to deal with, and the SB13s are more than sufficient to annoy my neighbors. No hype here (I'm also EQ'ing the hell out of the room, so the hype should really be for dirac), I just like sending my money to companies that treat their customers well and build solid products. And if you're willing to buy their outlet/scratch-and-dent items, you can knock a decent amount of money off the cost (it's how I wound up with a second sub).
I wish Amir lived a little closer, I'd bring some of my kit over for him to measure. (I don't even know where you'd start for setting up the klippel to adequately measure the ultra floorstanders though, given the weird driver layout.)