What is the best exercises for building big biceps if curls dont do it

THANX

BUT SURELY BY DOING THOSE 3 DIFFERENT EXERCISES FOR THE BICEPS IM HITTING BICEPS FROM DIFFERENT ANGLES,WHICH I WOULD THINK BETTER DEVELOPS THE BICEPS.

Thanx, does that mean i would be over training arms by doing original sets/reps?ie
3x10 dumbell curls
3x10 preacher curls
3x10 hammer curls

as this means im doing 90 reps for biceps ?

Hi,can anyone explain to me why you have to do 3+ sets to build muscle?,and does that mean 3+ each exercise, ie - for biceps
3 x 10 dumbell curls
3 x 10 preacher curls
3 x 10 hammer curls
or 1x10 of each which would add up to 3 sets for biceps

Hope this can be cleared up.

THANX