I'm going to say the Carvin, because I'm a fanboy more than anything. To be perfectly honest I've never had nay experience with any of them.
Dissonance is Bliss

Signal Chain:
Carvin CT-4
Ibanez TS-9
Carvin Quad-X
TC Electronics G-Major
Mesa/Boogie 2:90
Ear Candy BuzzBomb

Member #4 of the Carvin Club
Carvin is like.....right down the road, and its nice. I was leaning more towards that one anyway. The guy told me that the Carvin mixer was not compatable with ProTools, which i dont use anyway, but i herd it was good.