So, I have the opportunity to buy any of these heads for approximately the same price (it's quite hard to find good amps/heads where I live). The darkglass head would be a bit cheaper. I can't really decide, though. Would the Darkglass Microtubes 900 be able to emulate a acceptable tube OD tone? Would the Ampeg be loud enough for live use? Is the tube tone worth the maintenance and the extra weight? I feel like I'd enjoy the V4b far more in a studio, and the darkglass would be a versatile and portable head that would kill it live in any situation. Can't really decide what to buy, what do you guys think about it? I know they are almost polar opposites, but each one would satisfy a part of my needs I think.