I'm looking for a really good combo amp (preferably a 2-12). I need something that can give me headroom in almost any situation, because we play alot of different size clubs. I am also a tone junkie, so it has to sound good. I'm leaning towards the Mesa M6 combo, if I can find one, but I have also read good reviews on Markbass and GK. The Mesa Bass Buster 210 combo is interesting too. I'm just curious on what your opinions are, if you have played any or all.