Agreed, the render actually looks like a scratch book where you cut out the picture you want and paste it on, sry. Though your bg has a great outcome.

The font on the left to me doesn't fit this sig, while I like the idea and the font it seems more of techy style then a grunge when compared to your other font that is in the sig.

So it just needs a better blend. and either font will do just pick one though imp :P.