They are pritty good. I like the text in some & some i dont.. I feel the text in 1,2,3,5 might be a tad to big.. but they dont look bad. good effects on the text.

on sigs 2,3,4, the renders are not apart of the BG very well, trying to say that in the correct way. they just dont look like they belong there.. its like when you goto get your photo done for school "5th grade" and the photographer drops a BG behind you for the photo with those blue,pink,red laser beam looking things..

looks like he is posing with a fake bg..

maby blend them in some..

I like the 1st and 5th one the best.. the 5th one the render blends/flows pritty well.. GJ