Alex - not meaning to ignore you...Dual subs are out, I've got a SVS PB13-Ultra in my master bedroom, and its waaaay more sub than I need. I was surfing XM on Directv, and found some rap, my caregiver smiled and cranked it up and I thought my house was going to crumble in on me! I keep forgetting how much sub that monster really is.
Ebay - Scares the heck out of me. Too many horror stories. Have not tried Audiogon.
I really appreciate everybody giving me advice. I think I'll play with my port plugs, and eq on the sub first, but I know myself, I won't be happy till I get a DCX 2496.