I'm considering both of these amps for my next amp. I play in a modern country band and use Ernie Ball and Fender 5 string basses. This head would be used with two GK 1x12 cabinets. I really like the GK MB series but, I don't need to have two channels. After comparing both heads I also like the knobs on the GB a bit better. The plastic knobs on the GK seem a bit flimsy to me. The GB looks like its made better and is easier to use. (Not a fan of the dual function knobs) Would love to hear from people that have played both why one is better over the other.