I have the GK MB210 and I love it. I also was looking at the MarkBass 2-10 cab. The MarkBass is also really nice and it has a tilt-back design which I think would be great to have. In the end the factors that made me choose the GK was that I liked the tone right off the bat. The MB has lots of tone options, but I couldn't get a tone that worked for me. (of course tone is in the ear of the beholder.) Also, the GK was much less expensive, which offset the tilt back option for me. Both amps are absolutely amazing from a power/tone/weight ratio to me as someone that has spent more than half of my life hauling around huge heavy amps and cabs.