Raised white letters or blackwall

You're going to pay more for white letter tires, lesser quality than available in black only tires. (DONT buy T/A radials!)
As said above, your car will look great, either way. Your opinion is the one that matters.
That said, I think I would put white letters out on your car, even though I have whites inside on two of mine.
(Great wheel choice too, btw)