If I lived in the states I would have 100% bought a build-it-yourself sub from parts express. I've heard their 12 inch one and it blows away anything in it's pricerange because everything else is using 30 dollar drivers.

http://www.partsexpress.com/pe/showd...number=300-764

Check that bad boy out. Should be able to tickle your bowels. In other words, provide a hell of a lot of bass.