I actually have a set of Black Hawks in one of my 7's and I don't really dig them. Really ice picky high-end even with just straight riffing, but my guitar has a maple neck so that might also be contributing. Planning on trying out a set of the Paul Waggoner signature PU's soon
The High Gain Essentials for sure..
http://www.ownhammer.com/store/index.php?main_page=index&cPath=104_117
I actually like the Mesa w/ chinese V30's best
The Axe Fx doesn't model cabs, it just loads impulses.
About the cab/power amp reaction... doesn't the Kemper just attempt to copy the wave output of a rig? Not really modelling the amp circuits per se like the Axe Fx
Yeah Steven did some comparisons to the hardware counterparts in the long VMR thread.
Those don't do much for me though, it's always better to demo them yourself