Whenever I'm in doubt, I ask myself, 'What would Jesus do?' And then I realize, Jesus got crucified, so maybe his decision-making isn't all that great.
I think that it would be more true to life, true to the Bible. I wouldn't have a problem with a black man playing Jesus. Being born in that part of the world, he would be more close to being black than white anyway. Although what he did transcended all races.