http://img.photobucket.com/albums/v3...gs/powcopy.jpg
http://img.photobucket.com/albums/v3...in/Sigs/ss.png
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Your first sig the render seems to be out of focus... thats the only way to describe it that I can think of.
I like the idea of the second one, but it would look much better if the whole BG was cartoon style, With like strokes and single colors