I don't think it's one of your best.
(giving you a CnC just as I would any of your other sigs)
I don't think the color you chose for the smudge really fits in with the render, it's just kinda a smudge out there that looks weird. Don't get me wrong, looks nice, but looks weird. It might just be me, so don't take any downs off this whatsoever.
The render looks to have been tampered with, as if it was melted. That's not the best way to blend, melting the render. o.O.
The contrast seems to be brighter on bright on dark, overall. However, on the brighter layer you seemed to only brighten the head. This confuses me, it's not that it looks bad, but it doesn't look much better adding a lighting effect strictly on the head.
The text also isn't very good. The placing is okay, not the best place in the world, but not the worst. The type of text and color choice is where you went wrong; you blended it in too much. Text isn't supposed to be invisible, it's supposed to be visible but not take focus away from the render. This isn't a major thing though.
Other than that, nice. Better than most GFXers in the community.