Impressive edits, RedKnight (and Phlakes)! They bring the piece a long way from where it started, IMO, and I like the subtle changes in design and lighting you've made. A few things I've noticed, however, the breast-plate--and belt, to a lesser degree--seem to be viewed from the front on an otherwise 3/4 view-sprite, on both male and female marines, and it seems a bit out of place when you notice it. For some reason this was never covered.
Can't wait to see where surt goes with this sprite after all these suggestions.
(By the way, you may want to edit your double-post into one post, Red. Just saying.)