Fashion advice for 10 points... Help me to be cool...?

I have a wedding to go to on Saturday (I'm not the groom!) and I plan to wear a lovely dark brown Georgio Armani pin-stripe suit with mid-tan Bruno Magli shoes and dark brown socks. I'd love to hear your thoughts on shirts, ties and belts? I'm tall and dark with an olive complexion. Thanks, you lovely fashion gurus...