So Ive been seeing a lot of tempting For Sale ads in the classifieds lately selling Gallien Krueger heads for seemingly low prices. Ive never owned any GK heads, but I did recently try out the Fusion 500 and MB200 at the local shop and liked them both. Ive primarily played Ampeg for the last 10 years, but these days Im feeling less enamored with my tone, and more open to looking into different options. Before I go renting/borrowing heads, maybe the GK fanboys here could fill me in on a few things you like about these amps compared to all the others out there. The bi-amping option looks nice, though it would take a complete rig re-design for me to fully take advantage of that. Also, whats the major difference, besides watts, between the 700, 800, and 1001 RB heads? Do they have different preamps, or are they all more-or-less the same amp in a different package?