Marc, where did you "borrow" one from? I'd be interested in borrowing one as well, if at all possible, and perhaps upgrading my 10" HSU STF-2 to a 12". My HT is in a concrete basement, 13' (w) x 23' (l) x 8' (h) and my HSU has trouble making things shake from 12 feet away, so that's why I added...
I got my HSU STF-2 while I was in California Dec. 2003 from CompUSA for $349, $50 less than what it goes for online. I think it has very good bang-for-the-buck especially since I didn't have to pay PST/GST/duties when crossing the border with it.