i know there's a thousand threads on the GK 1001RB here on TB, but yesterday i tried one out as sam ash here in jersey, i was very impressed. it's really loud, and i now understand the comment about the "fast attack" of that head ... (compared to a tube vibe, which is where i come from) ... the 4/5 string bass button really makes the head go deep. the head in the store was hooked up to a gk 4x10, but i think i plan on pairing that head with 2 aggie 112's ... 540 watts ... that oughta tear heads off when necessary. i think i'm gonna get one ... only 18 pounds ... i love it. anybody playing this head thru aggie cabs???