are you mic'ing that beeyotch up or what?
have you tried all the options with it? [direct with its cab sim, a line out with an external cab sim, line out with virtual cab sim, mic and direct blended, quad vs. 2 tracks, using 2 diff amps for L and R gits?]. Seems like at least one would yield a pretty good result. Your version might not have the capability of running a line out with no cab sim though, not sure.
anymore, for my demos, I just run a line out from my randall, into a cheap cab sim, and put a mock analog tape compressor on 'em, no further EQ. I use a different guitar for L and R to get some variation in the 2 git sounds. works fine for me yo. I just kept posting stuff until I got the EQ on the amp where peeps didn't seem to complain about EQ stuff; at that point, you don't need a VST EQ cause it's dialed in on the amp. I know peeps say don't further compress distorted guitars, but the tape compressor AU I use really makes 'em come alive more somehow.