I like design #3 the best, but the horse needs to look more like a bucking bronco. Front legs should be on the ground, but back legs should be up in the air. You may just need to rotate the image counterclockwise so it looks like it is bucking. I would also like to see the stars replaced by a cap nut or an acorn nut. You should be able to Google cap nut and see what I am referring to.