I bought a set of 2 18X9 and 2 18X9 for my white 2001 GT convertible. They look great with the white paint. I had chrome wheels before, and I was a little apprehensive that these wouldn't look as nice. Boy, was I wrong. The overall look exceeded my expectations. I would go with anthracite over black - you can see the spokes much better.
If you really want to complete the look, get lowering springs and drop the car 1 inch. You will be amazed at the difference!