(yes, I know that you probably clicked on this thread to yell at me, but please don't =)
I have a fly-front tux, and want to wear it. Yes, I want to be fashion-forward, because, I'm going to such an event. I just wanted to know if mandarin-collared shirts were only for the tuxedos of the same name.
My inclination would be to say that you can't wear them together. However it would help if you can post a picture of the proposed ensemble to see the button stance and also post what event your going to.
I think that would look best with a turn down collar and tie. I think the wing collar shown looks bad, and I'm afraid a mandarin collar would as well. Most of the people in the pictures looked like they were wearing bad prom leftovers, the key is to be different, trendy, but not cheesy.