Great! Too bad he doesn't live in the Netherlands... Judging by his name, he would likely have lived in the same region.
Don't forget to make some good profiles of your amps before selling them. Two Rock, Samamp (according to another thread)... you really have quite a collection there!
The EV's also have a kind of flat response, maybe that's why it sounded good with switching the cab sim off? I can't think of a reason for the dark sound with the cab sim on/ the tone controls thing, but I'm relatively new in Kemperland and my amps aren't interesting enough to profile so no profiling experience here. I hope someone else can help you out.
BTW, have tried your profiles with a FRFR speaker (Ritter/Palmer). Will be getting my EV 15L cab back from a friend this week, going to give that a try as well.
Thanks!