I like it but the background seems a little off. Make sure you blur all of the person's shirt b/c there are some parts that are sharpened.
I think that this is a nice sig, but a few aspects are a bit bothersome in my opinionI think the motion-blur effect on the hand on the right side of the sig looks odd, and everything just looks very flat. The texture is a bit bothersome as well. The lighting is ok, and the border is fine. The second version looks better. Overall, it is very nice. Good work.