I have two pair of sunglasses in my normal daily wear (it's SOCAL, I always wear sunglasses). One is a pair of Ray Ban Predators which have shown themselves to be pretty tough for everyday wear.

The second is a set of Wiley-X PT-1 with an assortment of interchangeable lenses. I got the Wiley-X for Skeet/Trap (hence all those colors) but found them very good for driving because they allow very good peripheral vision. I bought a second set which I leave gray for driving.

Both sets have polycarbonate lens material -- tough but very good from an optical point of view.