The text is very plain, and it really should be changed. You should try to add a better background.

You should try to blend the render in a bit more. I would also change the text a little.

This is good sign me up too

You should really look to do more in each one. Since its just two pictures combined with text you should try making your render blend in more with the background. Also it would be nice to pick a text ...

It definitely needs some depth. I really don't like the background either, you should try to darken it up a little.

By any chance do you mean something like this.
http://tutorials-photoshop.com/photo-effects/fade-out-border/index.php

I think the colors work great. 8/10

I think the sig is nice for the most part. I really dont like the left part of it though. I think you should remove the weapon on the left side since there is no arm.

It looks nice overall 7/10.

Good job, it looks nice 8/10!