You know what, I think you've just hit the nail on the head there with your own 'theme' here..
Personally if it was me, to avoid a DK duplicate, lol - I'd do the C U P R A
badge in black, the rear diffuser matched up to that very black, the wheels hyper/high power silver.
And then the big mod that I see on loads of people's cars they can do = Silvatec side repeaters bulbs to get rid of that fried egg in your rear clusters
This is what I run on mine, front and rear
http://www.powerbulbs.com/product_detail.asp?prod=69
The small mods make all the difference. She's looking really sweet now mate, a few changes here and it's going to be MINT.