All those colors are pretty nice, but that orange is RACY! I think it would look great with a simple creamy white top; when everything is "pearly", the pearl loses some of its impact. The contrast of the pearl flake against a solid color gives it more pop! Any way, it should look cool, since all your choices have a certain appeal.
On another note, there's a good thread (on this site I think) about correcting this kit around the windshield/cowl area. There are some shape issues, but I can't recall the specifics; IIRC parts of the Revell '50 Olds were spliced in to get a more accurate appearance. That ring any bells with anyone?