I LOVE my Mark 3.

Mine is the red stripe, I believe.
You have so much control and variation with the EQ. I use a 4x12 marshall 1960a (well, either 19 or 18, I'm drawing a blank haha).
For live man oh man, so much volume. This thing has only gone above 3 once and that was when I was playing outdoor fest.
I just convinced my guitar player to get a mark 3 and he is in love as well...