So I've posted a few threads about amps and stuff and I never got my question answered. So will the V18 112 be able to go over a drummer, bassist, and horns clean? Or should i go for the v33 212?

Also, will master volume down on the v33, but gain up still OD the tubes like with the master up?
I would go v33 personally because the faster your band will play, the louder the drummer will tend to get and i dont think the v18 would cut it without clipping. Also yes with the master volume down and the gain up the amp will still be overdrivin but it wont sound near as punchy as if the volume were up to lets say 6?
Depends on the other musicians and the style - but I think the V33 would be a better choice.