Yeah, at first, I also thought that the white stripe would be the one to get because I feared that the black one would be nearly invisible on the blue. But now I think the black stripe is definitely the way to go: first, it is not so flashy as the white one; second, there is no other white thing on the car (besides, maybe, the aluminium wheels) but plenty of black details. All in all, it looks very classy. And believe me, in reality it looks even more stunning because the metallic effect of the estoril sets it a bit more apart from the black.
I will consider this; in a couple of month, when spring comes (and with it the summer performance tires), I will see what I can do.
When I got it right, the performance aerokit (front lip, back diffusor, spoiler) do for standard have this carbon look, don't they? On my car, I guess it would be a better fit if they were just plain black, so I would need to get them painted.