i just loaded up every Scumback 75 IR from the Ownhammer pack that i bought and went through all of them. 3 of them are my immediate favorites. while i was testing my soundcard, i went to youtube.com and was listening to Mark Day play his "monster tone" preset from the axe-fx II. i decided to try duplicating that sound with a rocktron prophesy/epsi combo. wasn't as hard as i thought. it appears that the IR greatly determines the overall sound. some minor pre-eq tweaks and i was getting a very similar tone.

i believe that the Epsi with the right IR has no problem helping a modeler get into the axe-fx/kemper territory (tonally)....effects are another story though.