I have been trying to find a used SVS clinder for the last few weeks without any luck and was about to buy a new PB10-ISD. Then on Saturday I struck gold and saw a 20-39 PC+ for sale from someone on these very forums and like a shot I was down to Kent with the readys. Bingo and Bobs your uncle I am now the owner of a used PC+ for what I was going to pay for the PB10. I did have a demo of both these subs at IanJ's last week(thanks one more time Ian)and whilst impressed I still was not quite convinced that I was going to get a meaningfull improvement on my current sub (paradigm PS1000). Well I set the sub up today and all I can say is WOW! I nearly shat myself when I played the scene of Darla taping the fishtank in finding Nemo( I listen at or near reference level). The paradigm would go loud and low and pressurise the room, but this beast just trounces it.I may not have it properly set up yet as I can't find my SPL meter but the sub is set at -4db on the receiver (Denon 3802) and output on the sub is at 11 o'clock (less than 50% output) I had it set at -3db & 1 o'clock to start with and the sub bottomed out a couple of times on Master and comander battle scene.I don't know what Db level I am getting but it's bloody loud. Anyway I am now in subwoofer heaven and can't think I will ever need to upgrade my main sub again(at least till this one breaks), what a bargain thanks Chris from Kent who sold it to me.