I just bought my GK 800RB used to have as a reliable gigging amp and it is wonderful! I always raved about tubes until I got the GK and it is fast and tight! Anyways, I am using mainly with a Mesa Boogie 6x10 and I want to know what other users are using their GK 800RB with. I am interested in the Bi-Amping capabilities but I don't know where to start with a 2 cabinet setup? Any help would be appreciated!