Head over to the Rythmik Audio site and check out the F12 (aluminum coned driver) and F12G (paper cone), both of which sell for $940 shipped. That is their highest priced 12" sub, a number of more modest 12" are also available.
Rythmik is becoming known as a great maker of subs for music, even paired with ESL's and Maggies. Sterling Sound Mastering in NYC has three pair of the larger F15's in their monitoring systems. All Rythmiks are servo-feedback designs, and are known for their trademark "stop on a dime" sound characteristic. Uncommonly clean, tight, and punchy.