So, the Kemper....I've certainly seen quite a few vids showing it nail an amp sound, very impressive. I've listened to a lot of profile demos like M-Britt, Choptones,etc...Some obviously are better than others. The one thing that concerns me regarding the Marshall-type/Friedman profiles I've heard is this: Can they really get that "crisp but not brittle" top-end bite common to the Marshall sound?
I've been chasing Eddie's tone for years. I hand built a Metroamp clone (68, 12000 series) and spent hours and hours modding the thing with help from rockstah and Friedman and others. Eddie is my number one for tone, even though my tastes have branched out a lot.
It seems your tastes are close to mine. I don't have a Kemper yet, but the tones from Top Jimi have me convinced. I highly recommend you check out Top Jimi Brown Pack on youtube. Please note it is youtube and there's some sound degradation.
Link: https://youtu.be/m9UMHc4rs2k
Oh there's a Soldano model, too. I'm on a slow inet connection, but it's on his youtube channel. Top Jimi also has a free demo pack in the RE