Pretty cool
I do like this. Actually I like it a lot. The main problem that i have with it though is Anatomy. If I were you I'd look up some good (cheap) anatomy books. The next thing that I noticed was how the leg on the brute looks too odd. Can't quite think of the right words but it seems off.
Other than that a fantastic work of art and I do hope to see more!!!
(Remember to work on Anatomy though, you're not the only though, I need to do it too).