Zurich, by far. They even take care of those of us with prescriptions by selling glasses that to OVER our regular glasses.
As Ken said, I've flown into the sun. In the spring and early summer, the sun rises right over the area that our planes are usually flying in the morning. So, we have to contend with that. I often fly in a different area of the sky, but due to a bit of a problem with neighbors under that area, well, we have to fly in the area that lines us up with the sun, or not fly till after about 10 AM or so. The Zurichs are great because you can fly in that area and still clearly see the plane well enough to get it back. That has saved a few planes in our club, especially at that field. (we have two).
So, it's Zurich for me.
http://www.zurichsunglasses.com/FAQ/faq.html
CGr