For bigger venues, where the KPA is played directly into FOH the sound might be very close to a miced amp, but for a small bar gig, where the direct amp sound is basically what the audience is hearing, b/c there is only FOH for vocals and that's it, I am not sure, if the audience will appreciate the hifi-sound of the KPA as it sounds sometimes fairly harsh and brittle when using mid to hi gain profiles.
For some reason, I find, that the KPA sounds better with single coils than humbuckers. I have a Strat, Les Paul and PRS Custom. They all sound very different through the KPA. To me the Strat sounds best with most of the profiles. The humbuckers of the other two guitars sound very agressive and the harshness in my opinion even increases, when using these guitars.