Dude, sexy. Love the coloring and the affects. Bad parts: It's flat, and the focal isn't very focalized. Add some white, and maybe a border(or rather a larger one then what you already have. XD) Also, I noticed a somewhat inconsistent light source. How does the light source have an affect on Master Chief but not the smoke/cloud/debris in front of him?
It isn't that bad, actually. XD I think maybe if you dimmed down some of the outer light area's and then brightened the ones closer to the stock it would look better. Also, bring out the stock and beef up the border by a few pixels. XD Could use some flow too. Liquify seems to be popular these days.
I know how that one feels D: Well I am just gonna say this and let the kiddies here take care of the rest, your light lacks proper reflection and it is pretty much the same on every part of the armor. Fix it.
as far as text? how bout "fight to the finish" fight on the left, to the finish in the right....otherwise it looks pretty good, but i cant tell where the light is coming from, on top, or in front?