I'm running Eminence Legend V12's now. been a huge MH fan from day one. I wont say I try to go for Rob's tone but mine is pretty simular. Then a gain a 5150 really always sounds like a 5150 unless you suck at dialing in a good tone.
Meh, I like V30's better but it could also be the box mine are in. My other guitarists Mesa cab destroys mine.
And MH uses Marshall 1960's and KSE probably use Mesa, I could be wrong with KSE.