Nas

http://i33.tinypic.com/10olhs1.png

nice but u should add smudge a bit,
there is no too much action in this sign,
i prefer to add C4D's and smudge,
but its your style...
ummm there is oversharpen here,
the nice isn't very good try to fix it :P
bottom line very good :)

nas is very behind the text, wich makes the text the focal. as iB said: add c4d's to obtain a flow. Also try blending nas in to the bg by erasing a little bit of his left shoulder and arm with a soft brush on a low opacity.. you can also do that with the bottom of the render, or put a c4d in front of him (will add depth as well). i like the effects you did so far!