I also like the red version
And here goes my C&C....
The background is awesome. Normally I'd say that the render is too small, the background overwhelms the render, blah blah blah, but I think it worked pretty well in this sig
The only fault I see in the sig at the moment is the text, which is a bit hard to read and is kind of, you know, in the way. Also, a suggestion - When you burn/brush the sides (this was a brush, right?), do it under your photo filters and any other adjustment layers you have, then it'll have the same tinge as your overall sig. I'll just use Sworn's request as an example:
Do you see what I mean? Or am I just rambling again