I currently run my Kemper through an RCF Art312 MKIII. I'd say the sound quality is pretty solid. I run it from the monitor out. One thing I have noticed though is that nearly every rig I load (many of the popular ones here) needs to have the cab changed in order to get tones that don't sound like there is a blanket over them. I play a Les Paul Limited Edition with MCP Detroiters, so I'm fairly confident it's not due to my guitar (results are the same with my LP Standard and my Strat).
My question is for tweaking profiles at home, would a set of active studio monitors give me a better representation of the true tone? I see a lot of praise for the iKey stuff here and have read good things about the Behringer Truths. I'd be interested in investing in some decent active studio monitors, but only if it's going to result in a more accurate representation of what my Kemper is putting out there for fine tuning purposes. If the result is the same as what I'm getting with the RCF, then it would be a pointless expenditure.
Just wanted to get some thoughts from the masses on this one. I find I listen to a clip of a profile online and then when I play it with a similar guitar (LP but with different pickups for instance) the results just aren't even close. Perhaps I'm missing something though.