looking great but im still not happy with they eye colour area. if u look at most eyes of the gorilla as in most peoples eyes there is a white reflection cube in them perhaps try getting a small area light to get this reflection. Take a look on the cgtalk site all eyes have this kinda thing. i personally think if u get the eyes right mate ull b onto something good. there the most important thing and shouldnt be overlooked.
Also the pupil could be larger than the iris.