I play through my Tech21 Trademark 10 amp, miced by a Studio Projects B1 (condenser mic) through a Behringer Tube Ultragain MIC100 mic preamp.. then out of the preamps unbalanced outs and into my M-audio Audiophile 2496 soundcard (2 RCA-inputs).. software, I use Cubase SX2.01 and a bunch of waves-plugs.
My amp also has a PA-out (or SansAmp, whatever you want to call it), and I've tried using it as well.. through my preamp that time as well (I like the little touch of warmth it gives).. but I just feel the air between the amp and the mic inproves the sound.. fuller and more "alive" in some way.
I'll record a little riff tomorrow for that thread, I think..