Oakley
They have THE BEST optics.
-patented XYZ technology...basically no distortion when looking through the lens.
-variety of styles/colours
-variety of lens colours/shade
-materials, plastic to metal
it is what the pros use in racing, cycling, running, shooting, beach volleyball, skating (hockey, too)...even military use. look at all the olympic athletes and other sports figures.
yes, they are expensive. but, unlike other expensive brands (CK, Nike, Scott, Gargoyle, LV, Coach, Adidas, etc.) you are getting a quality product.
with other brands, you are paying for the name. in fact, you may not get 100% UV protection...and you will get lens distortion.
with Oakley you are paying for the quality of the lens (yeah, and brand too), 100% UV protection, no distortion, impact protection (can be used as saftey glasses, meets or exceeds saftey regulations)
I will only wear Oakley sunglasses and frames. I have 5 of sunglasses, 3 pairs of prescription (frames).
Check out their stuff, not only sunglasses.
http://oakley.com/