i use a Palmer PDI-09 right off the speaker out of a Mesa Boogie MarkIIb.
i also have a WEBER Mass Lite attenuator at my disposal,
so if i want to record quietly,
i can simply put the weber AFTER the palmer,
the palmer sees the full output of the amp,
the speaker cab sees the attenuated level from the WEBER,
and i have total control of volume, tone, and character of drive from the tube amp.
after trying many systems (but not the kemper!), this has been the easiest and best sounding set up for me,
to date.
you can hear this setup in action,
over in the songs forum,
"Walked Away".