Whichever sub(s) you decide on, get a Dspeaker Antimode to go with it. I have the 8033c on my HT sub (SVS 20-39 PC+) and use the Dual Core for my 2 channel rig.
Do a search and check out the great reviews and owner comments on these very good pieces.
Do a search and check out the great reviews and owner comments on these very good pieces.