Do you want us to build your car for you?
You're asking a lot of opinion questions. Don't just go off of what we want, it's not our car. We don't really care as long as your own taste would not be to make a ricer out of the thing.
But in my opinion, I'd repaint it with a factory 300zx color, or a tasteful BASF paint (my favorite paint manufacturer,) such as this paint:
By the way, the term 'body kit' insinuates that you're trying to make this a show car. What's your goals for the car? what do YOU want to build? We can point out options that might help you once you provide that sort of answer, but for us to just TELL you want to put on your car, you might not be happy with it because it's not built to your specific taste. You know what I mean?