Good tag karter! The first thing i notice though is text palcement. For sure i agree with jeff. DEF move it down by his hands. Right now its wayy to distracting and ruins the focal point (his face).
The BG and effects are cool. Looks liek the apocolypse. And hes just liek a badass walking through it all. Good colors they match up well and lighting isnt bad either.

I agree drop the border and sharpen the etxt in the top on like you did to the second. nice usage of c4d and very good font choice. You did a smash job on that text.