Great capture. It seems a tad overexposed to me though. You might try to play around with levels, if you have Photoshop anyway. The detail it brings out is amazing. Good luck in the challenge.
Arthur is beautiful. Really nice shot, but a little overexposed IMHO. Could bring out a little more color to make it pop too. Love his expression and the composition.
Detailing is really nice. Maybe blur out the ropes hanging behind his head. I'd up the color a touch and maybe the contrast as well. Very nice capture overall.