Hmm, very nice. I never had a chance to play the groove tubes preamp but always wanted to. The only Bogner I ever played was a XTC but for some reason it didn't sound right (It was a used model at a guitar store that I came across one day so i played it for about an hour). I want to like the Mesa Cleans but for some reason it just doesn't do it for me. I think I may be too picky when it comes to cleans.
I would love to try a CAA but I have no way of trying one.