Were I in your shoes, I would be cautious about a notch-lapel tuxedo, as this
is a rather trendy choice (yes, I'm a clothes snob).
If you want something classic, the rules are simple...
1. For the tux: Peak Lapel, No Vents, Uncuffed Trousers.
2. For the shirt: Bib Front (meaning flat, not pleated), Windsor Collar (Wing Collar is for white-tie), and Simple, understated studs and links.
3. Pre-tied bow ties are for high-school proms.
4. Cummerbund is optional. Traditional, yes, but not required. Braces also optional.
Here is an example:
Black Dinner Suit Jacket | CTShirts - Summer Sale | US