I like the first and the third.
The first one gives me a sense of the green jockey pulling away from the pack. It might have been better showing a little bit more of the pack on the right, but I still like it.
I like the 3d better than the 2d. With the horses' legs bent, there's much more of a sense of speed. And while I think I've heard that it's usually better to not have people in the background for shots like this, the one spectator in orange really adds to it.