How is this sub? I was just in a local Circuit City yesterday, and I noticed they had 2 of them there, one was open box and the other was the display model. Turns out they were the only 2 left in any CC stores in my whole state. They both were tested and checked out fine, and they both come with full warranty. Long story short, I bought them both at the 'open box' price of $409 plus tax each. Plus, they had 24 month interest free financing to boot, so that works out to approximately $30 a month for the 2 of them. Was this a good price for a descent sub? I did have Infinity IL120S. Is the Velo CHT15 a definite upgrade? Specifically, how would 2 of them stacked fare against anything else out there at the $820 price mark? My ultimate dream sub is the SVS PB2ISD, but unfortunately I can't come up with the cash at this moment for it.