They both look pretty good.Though the last one.... well the render just doesn't go with those colors. =/ If the BG was blue it would have looked great.
i like the whole style and stuff. the first is probablt the worst of the three. the second and thirs seen a bit better. persobnally, i think that your sigs are generally a lot better than these.
and remember not to fall into the trap of a repeated style
They look nice I would like to know how you make those border ^^, U see, i never used borders before, i looks like its in for the time being, so im not very good with making cool borders ^^