As much as I love the OZ's, and would love a set on my Cougar.
I think your car looks perfect the way it is with the GF-1. The style of the spokes and the color match the color of the car beautifully.
Plus if anything was to happen to the GF-1's, they would be a little easier to replace.
Personally, i like the chrome FSVT wheels. I think it compliments with the engine bay.
But if not the FSVT then the OZ's i only didn't vote for those because i am not a fan of 10millions spokes, but i think it would look better than the dark wheels on it now.
I like the black on your car. But the OZs are my vote. Personally, I would try to the OZ and try to find some later. 2nd choice chrome FSVTs and 3rd choice would be the Enkeis!