Preparing your tracks for reamping: A Guide

I'm looking to get a re-amp box, is the Radial X-Amp a safe bet? I'm using an M-Audio Fast Track Pro right now, is this how it would work:

Fast Track Pro -> XLR on X-Amp -> Amp
and then the mic on the cab would go into the other input on the FT Pro
?

still a bit clueless on how re-amping is set up
 
hi guys, i was about to shop for cheap radial or countryman DIs, but I notice someone mentioned Edirol soundcard. What I have currently is a roland octacapture with VS Preamps , a higher-end brother of edirol, and the reviews said it is very clean and neutral. do you guys think I still need those dedicated DIs ?


---edit---

as I understand it, guitar/bass > radial or redeye DI > soundcard's mic preamp > DAW

wouldn't the mic preamp already add coloration to the DI's signal ? So why bother ? Would it be better to use my GSP1101 bypass mode than record straight to the DAW via USB ?