Hi, A. I still use the PC13-Ultra. I got an SB13-Ultra as part of a contest here (I didn't win and get it free, but I decided to pay the discounted price to keep it), and now I run two subs.
I love the PC13. It's so much better than the B&W ASW-1000 that I was using. I remember playing
Mr. & Mrs. Smith when I first got it and just giggling like a school boy when Brad Pitt went over a hill in the dune buggy and hit the ground. It was the first time that I can remember feeling it throughout my entire body. Just a great buy at the (then) $1300. The SB13-Ultra is incredibly similar, but much (MUCH) smaller. It won't hit the same volume levels as the PC13, but for any "normal" home theater, I think it's the way to go.
These days, I don't really notice that added thump. Perhaps I'm just used to it, or maybe I just don't listen loudly any more. I do like having it, though.
