The costuming in the movie was stupendous! There is so much detail and variation in the armor, helmets, etc. I chose Peter's. I thought it was really cool. It seemed to be the only one with a face shield, unless it has escaped my notice. The centaur helmets are also cool though.
I like Edmund's because of it's great shape and wonderful tooling. I didn't like Peter's as well even though it had the same shape, becuase of the visor which blocked quite a lot of the view.
I liked Oreius's basicly because I like that open but protective helmet style that is open in the face but long down the sides and back to protect parts of your head that are hard to guard. I wouldnt esteem very highly someone who couldn't guard his face from almost all blows (except in a joust or something like that.)