Aside from the obvious differences (2 ohm vs. 4 ohm operation, tube vs, no tube), has anyone done a direct comparison between these two heads? I'm considering both for a smaller rig, and I'm on the fence about which direction to go. I currently have a MarkBass SD800, which is a monster, and quite frankly, more than I need for smaller gigs. I'm considering one of the above for smaller shows. I've been through the mega threads on each. Anyone who can shed light who may have done a direct comparison would be helpful!