I mentioned before that the hair closely resembles the twins from the Matrix series, this is them:
http://www.freewebs.com/nedderino/The_Tw...x1200.jpeg
I think with a lower hue of grey that it might fix this. With a darker color like you're using, you're putting more emphasis on the individual lochs of hair.
To get an idea of what I'm talking about with the Twins, watch this in 1080p:
http://www.youtube.com/watch?v=SjQkP1kpUGQ
http://www.freewebs.com/nedderino/The_Tw...x1200.jpeg
I think with a lower hue of grey that it might fix this. With a darker color like you're using, you're putting more emphasis on the individual lochs of hair.
To get an idea of what I'm talking about with the Twins, watch this in 1080p:
http://www.youtube.com/watch?v=SjQkP1kpUGQ