i've got two dual 2 ohm kicker comp vr 12's i'd let go for that price, definately better than your sony's, plus if you have a box already you can just drop them in.
i have a DD 1512 with a single 4 ohm coil wouldnt be a bad combo with your amp. and the sub gets decently loud for a single 12. shoot me a price and im also in MI so maybe i wont even have to ship