Deffo don't change the colour, or put Cossie bits on it / colour code. Externally it looks awesome and I wouldn't change a thing...
... obviously those jank old wheels need to go (lol) - get a decent set of 17" Image BBS style rims measured up and made for it at the perfect width / ET so it sits lovely.
Then stick with the YB at 500bhp and it will be one of the coolest cars out there.
Done!
Ben