I don't know whether this is relevant to this thread or not but my (limited) experience of Kemper profiles is that to get a good sound you really need to be using (1) the same type of pickup as was used to refine the profile (ie HB or SC) and (2) don't fiddle with the gain control, ie leave it where it was on the profile. If the gain isn't right for your sound, then find another profile that is. IME deviating away from the gain used in the profile totally changes the colour / characteristic of the sound and to my ears usually ends up sounding horrible.
I'm using my powered KPA with 2 Celestion F12-X200s in a Marshall 2x12. Needs some top taking off above 8-9khz to get rid of the fizz as the Celestions are pretty "toppy", but sounds pretty awesome to me. In a lot of respects the KPA sounds as good or even better than my amps (Marshall 6100, 6101, 2203 & 2558).
PS I tried profiling my own amps but the results sucked so I'm sticking to "paid for" profiles for the time being
I can get pretty close to that elusive "in the room" sound and with my band it sounds fab in the mix.
BTW I'm using mainly TMS, Tone Junkie, M Britt and Guido Bungenstock profiles.
Terence T I feel your pain mate.