I agree with the principle of less-is-more, I also believe black goes with everything. I like the finished appearance of having the license plate framed, and no exposed hardware. I always go with a plain black frame with black caps on the hardware. If you have carbon stripes on your car I suppose a faux carbon license plate frame might work. There must be a thousand plain black, and / or carbon frames on ebay.
Edit I just re-read original post...looking for a Redeye branded frame? I'd skip that. Plain black.