hey, I've got 10.1d's they are good subs but weak on the higher frequencys, they dont boom, there really tight and acurate, I'm looking at replaceing mine with something that has smoother responce, but they arnt crap and they do go low. I'd say $150 for 2 12's with an enclosure is a really good deal, probably saveing you $150 of retail.
I got two kappa perfect 12.1d's behind the seat of my toyota pickup. And They bass response is amazing, Right now I am running them at half the 350 watts, because if I give them what they want I got the whole truck vibrating. I got a lot of sound deadening work to do. They are in sealed 1cubic ft boxes, and I paid 160 for them witha custom box. If you want boomier try a different enclosure, bigger the box the boomier the bass. If you wanna sell the tens post up a price, i need a ten for the middle of mytwelves.