I don't really think the render needs to much more contrast... But yeah, work on some other effects then just c4ds. There is also to much stuff going on, it's to busy for my tastes. Oh, and add a border.
These have been either made from tuts or my own creativity...
I didn't use grunge on that one, it just turned out looking like I did.
No where near as good as some of you geniuses, but better then last time..