Based on your post in the Graphics Rating Thread (the one where there were three versions)
The second version looks best, in my opinion. Although the render looks more blended in the third one, it just appears to be a bit too messy. I still think that the left side still looks far too empty, for all of them. I was thinking 'spatter clipping masks', but that's just because I abuse spatters whenever I need to fill up a gap >.> Maybe... displacement filters? Effect/abstract C4Ds? More vector brushes? I'm actually quite stumped on this one. I just think that the render takes up too little space, so you're left with the task of filling up all that space. Meh.
Besides the gap-filling, I think that you need to work on the colours as well. In general, it just looks over-saturated/over-contrasted, and the colours look a bit bright. More colours might look good as well. Try sticking in some red, or dark yellow, or darker browns, just so it doesn't quite look as monotone. The text seems to go nicely, though. Nice choice of font as well. Ah, and I don't think the border needs to be there. Or if you really want a border, a 2-3 pixel black stroke might look better. The 1 (or is it two?) pixel white border looks too... fragile, in that banner o.o