cool man. i like the black and silver, its so simple but so original. It looks for some reason like somthing a pilot would wear, im not sure why i think that tho.
If i would add something...maybe an emblem on the side cuz they are pretty blank, or some light shades of silver and grey on the silver area to show weathering. Or you could grin up some charcoal pencils and dust the silver part to make it look like the helmet has some burns.
Looks very cool