So I'm thinking of getting a Gallien head, and dont need much more than 500 watts. I know the 700rb is a great head, but have heard mixxed reviews about the MB2. They have similar power outputs, but I'm wondering if the MB2 acheives that GK sound? If not I dont have a problem carrying a 20lb head (I'd have a problem if I couldn't). Would probably be pairing the head with a GK, Mesa, or GB cab if that means anything.