The feet seem a little odd, maybe you should adjust them just a tad, but otherwise its very good, though maybe you should adjust the chest part. Maybe try giving them inset mandibles on their face, just to see how that'd look. Also, do you think you could try a mockup of them wearing a pinstripe suit or with their skin a dusky tan color?
Hah, when I think about it, the feet DOES look kind of odd... I am not gonna make anymore or fix them today probably. Right now I dont feel like doing it.. Why dont you try it yourself?