I have a pair of Rudy Ketyums with the "ImpactX Photochromatic Grey" lens (not the Polarized Photochromic ones) and they work great in any kind of light from low to bright sun. I also have a pair of Rydons with the Smoke lens and they're nice to. The Ketyums just fit my face a lot better and are a little more comfortable. I'm really happy with the ImpactX lens though.

I don't like polarized lens on the bike because they tend to take the shine off of wet roads and I had a hard time telling wet from dry in partially wet conditions when I tried them.