rjs

I am considering purchasing the Quintet speaker system, but am uncomfortable with using the KSW-10 as it's system sub. I would like to use the KSW-12 instead, but my dealer located near me is not willing to "split" the set and sell the Quintet with the KSW-12(for a price-adder, of course...). This is not a problem, as I'll purchase the speakers elsewhere, where I can get what I choose. I am concerned that the sound of the KSW-10 will not be sufficient in the room I am wiring for surround sound. It is a partitioned/finished basement with dedicated TV area and sectioned off wet-bar and gaming area. The total room is approx. 20'x 30'. Any suggestions?