[Magnum]

Here's some constructive criticism for you. I think you have the basis of a good sig, but there are some problems. First, start off with an image about half as high so it's not as square. The guy would probably look better without the inner bevel, or at least with the shading toned down. You could also slightly blur (gaussian blur that is) the edge to clean that up a bit. The text is a little dirty. Make sure you are using anti-aliasing. Basically, just cut it down move the text down and clean up the guy, and you would be off to a good start.