I think it looks great as is, and I'm sure once he's actually placed in a scene, any of the little flaws won't stand out so much. I can't decide between the first version and the last though.. I think I kind of like that the last one has been smoothed out a little.. but personally, I don't know if I find the head bobbing is even really necessary, at least when it's that pronounced.. we do have spines after all.