Hmmm....
Well, if I told you 'great job' I'd be doing you a great diservice.
You know my motto. Aparrently you suffer from the same thing I do. In lightwave the object has a low poly count, however it has to be tri'd which x2 the count.

. From what I can see(Next time post a wireframe!) The amount of geometery and the amount of definition are mis proportioned. Too much geometery, not enough definition. You could easily shave nearly 700 polys off, and seemly lose not an ounce of form. (It worked for my Eyrilus.) And from what I can see(I hate saying that but all I've been given is one image.) The joints are completely indepentant...ie not connected. I do not believe thats a good thing.
Anyway Texture will always make or break a model. The poly count could be 1000 and if the texture was good, such little deformaties wouldn't be given an iota of attention or thought.
Well, thats my Constructive Critism. Nothing was said with malicious intent, but with observance. Of course you can do better.
I won't help you up the mountain of pride by saying 'GREAT JOB THAT ROCKS'. I'll say good start, and it's a good start.
rock on, and keep it up!
"Laugh to scorn the power of man..."