I will go with number 1. I don't like the vertical design. Actually, I despise it, but the depth and blur make it so the watch is the first thing I pay attention to.
Number 2, not a fan of monochrome.
Number 3, were layer styles used to create those shadows? It completely ruined it for me.
No#4 is interesting, but ehh, it's almost as if the focal was the whole sig, which makes it kinda awkward. A little depth instead of oversharpening would have fixed it.