I would say go with what grip you are comfortable with. I think I have done them all. At one point I gripped so wide that when I reracked the weight my palms would get pinched on the rack between the bar. Im currently going with pinky on the ring, and although the ROM feels significantly larger I feel no stress on my shoulders and feel a little more explosive. I think that grip is a personal thing, go with the one that you feel strong with (and the one that doesnt cause unneccessary discomfort for that matter)
Oh yeah and experiment around with some different grips (I would do this experimentation with lighter weights...say your warmups) and see what ya get.