Raz,
I think that BOSS (BR-8 or something?) and also Zoom (and perhaps a few others) make digital recording devices for guitarists that feature built-in drum machines. You could also try the Digitech GNX3 or GNX4 pedalboards, which feature drum machine and multitrack recording, too.
I personally use a BOSS DR-770 drum machine, and record my tracks on a Fostex VF-16 (which has been replaced by the VF-160) standalone digital recorder.
It's a nice, small setup for home recording, and you don't have to be tethered to your computer at all!
Nowadays they're packing so much functionality into these little boxes that do everything! It's amazing the kind of recording power you can wield these days for so little money! I routinely make demos at home that sound way better than studio recordings that I made on ADAT machines in the mid 1990's.
You should compare and contrast the multitrack recording guitar workstations from Boss, Zoom, Digitech and others to see what is out there. You're probably better off using an all-in-one device like those, instead of buying several components. You'll save a lot of $$$ and probably never need more than what comes in the box.
I mean, you can start building a recording studio and open up gear possibilities that would make OC go berserk! (Mixers, outboard rack gear of all sorts, monitors, patchbays, etc!)
It's a shame you just bought that V-Amp. You might have been better served with a Digitech GNX4 or something along those lines. It has all the effects, modeling, drum machine, and multitrack recording capability in one pedalboard.
Plus, some of the Guitar mags list Digitech GNX settings in the back with the sheet music, so you can instantly dial in the sound of the song.
You should write down your whole goal before you buy any more gear!