make sure you get the powersupply upgraded! otherwise it's just barely passible as a preamp. The only difference between the newer and the older is you don't have to use a computer to setup.
Tact Pre Amps 2.2XP
For some reason this post last wound up under "Speakers." Go figure. Anyway, I am thinking of purchasing one of these. There's a unit on Audiogon for $3495. Is it worth the investment?