I have and use a DCM200L in my Axe II W\D\W rig and love it. I send the fx loop send with no cabs through the Carvin to a Marshall 4X12 for the dry amp signal, while a pair of CLRs handle the wet stereo signal. Here in Madison Square Basement, I have the CLRs master up to about half way, and the Carvin has no problem keeping up, which is pretty loud. I have also had the rig out to a buddies shop, where we could turn up, and the Carvin had no problem keeping up with the CLRs turned up to about three quarters, and it was LOUD.
One thing to keep in mind about the DCM200L though, is that it really is meant to be for studio use and has no fan, so not sure if I would gig one or not.