Oh boy, am I apprehensive to talk subs LOL, may I suggest the 20-39 pc plus, according to SVS thre is a substanial difference in the plus models, and the cost seems "relativly" close, can't go wrong either way.

Sunfire amps & processor Sammy 50" Crown amp 2-SVS SS Maple Ultras, Axiom 60s,22s,150cc, QS8s