I see G Major mentioned so many times on this site, that I have to ask about it. I have an ME50 multiple effects unit that just sounds and feels a bit cheesy (and not as flexible tone-wise) so went back to individual effect pedals. What does G Major have that ME 50 doesn't? Is this a unit where you preprogram multiple effects settings like the ME50 and switch to them on the fly with a footpedal? Are the effects of comparable quality to individual pedals? Most of all, I don't want anything messing with my Mesa tone.