I think the white would be cool and different in a coupe. I can't think of a color it wouldn't look good in (well, maybe not Aztec gold or tangerine).
You definitely need to post pix (and tell us how hard it was) when you get it done.
I rode in a turquoise V6 vert once that had the white top&interior. It was a girl's car and she didn't take good care of it so the seats were a little dirty. It pro'lly would've cleaned up though.
While we're talking a/b rare interiors -I love the red interiors. I've only ever seen 'em in sixers, though. Were they offered on GTs, too? Seems like most V8 cars got gray (yawn), tan or black...