I really like #1, I think #2 would look better with the bright colors in color but I have not seen the original image. #3 Really does not do anything for me. Sorry I just dont get that one.
Like others have said, I love the #1. The other two not so much. I too think that #2 would be better in color especially if it was like the first. #3 I think would be more interesting if you could see the head of the snake, as it is, it just isn't that interesting.
The lighting/contrast on the first two is really nice =)