A deep purple would be really nice. I'd think on a Soarer/SC a dark green would be cool too. I've seen a lot in red, white and black. All good colours but a little over done.
Purple is a classic "New style" drifting color, but i don't think it'll match the car if it won't have any wing on it, it's that specific look of these cars that only works when it's overbuilt, Great car tho! i think it looks clean as it is, black is always a good choice!