#2 - I like the blended effect of the foam on the water - that said, I'd personally like the backsdies of the rocks in all the shots more exposed, but it's a tough call on the spot.

Overall, # 2 - nothing wrong with the others, just prefer the feeling of motion the water imparts.

My only, overall, suggestion, is as mentioned above - next time, more exposure on the backside of the rocks - may mean waiting a few more minutes to ensure the sky's not too bright, though. See, tough call to have to make on the spot.