The cage is all ready black and my first thought. Then I went to thinking spicy would be slick, similar to the gtspec parts. Started thinking that the spicy might be a bit much. Now I'm thinking of matte bronze. Just seems like I need an accent color. Still undecided. My only concern with black is it might blend in a bit too much and not be as much of a feature.
stay with your main theme. black and orange, and since its mainly for show, keep it black and like terbow said, just add some stickers to make the bar stand out.
hell, even get a camera mount and mount a camera in the center. black is the way to go.