As is, I would also say #1 seems leaves the most perfect impression.
However, I think I would like #3 much more if you left of more of the upper section. The one larger rock up with its top cut off makes me feel uneasy, and the still water in the upper right corner is very static compared to the rest.
I really like the big rock with the ice formation and the shape of the water flow around it. I would be tempted to crop the upper fifth or so off if it still makes sense as a composition, and you have enough resolution to spare.