These guys are all very young for making the big decision, but you clearly have too many, so I can see why you want to!
I like dark blue best. It may just be the stance that each boy is in at the moment the picture was snapped, but dark blue seems to have the more "curvy" look to him. To my eye. I know that color is important on a blue laced red bird, but at the end of the day, a Wyandotte has to look like a Wyandotte...