I know a very good gfx person who use GIMP for 95% of his career it can be just as good as photoshop give it a try
As for this sig.. V2's colors go with it much better, but id fix that light source its almost like it stop at certian spots and then starts again. Its a nice render i dont see much of those types around. Blackness on bg is ehh...
Tell you what, I'll give gimp a go, I already have it on the computer and I make my drawings with it, so I'll do 2 of the same sigs and compare soon, thanks!