Better than a MT by all accounts; has a kevlar cone and can handle whatever you wanna throw at it power wise. Quad 2 ohm coils mean you can run one amp at .5 ohm or 2 ohms, or have two amps both running at 1 ohm.
You're looking for more than one MT 18 at $400 a piece, but you can get a DD 18 for $700 shipped (the new ones on the website http://www.ddaudio.com go for around $1400 new).