I'm still new around here but have had my Kemper for about 3 months. I went out on a limb and sold my Mesa Mark V head to finance the Kemper. I currently play it through a QSC K12 or KH120 studio monitors using my Carvin "strat" with DiMarzio Area 61 pickups. The tones are definitely good and you can achieve it at any volume, however, to me the feel is different, maybe because I'm playing through a FRFR setup, or maybe I haven't tweaked the profiles enough.
Yesterday, I plugged into an old, beat up Peavey Bravo112 and it just felt good. Of course, the sound was limited and got boring after a while, but it felt good. Not sure if that helps but I would definitely say the Kemper is a keeper, especially for recording and flexibility. I've owned a lot of Mesa's over the years and haven't quite found the profile I like out there. Rectoverb, Road King, Mark V, Stiletto, LoneStar Special.