I recently picked up a set of Zeal Detonator SPX, and just used them for the last 2 days. They advertise as being good in variable conditions. Conditions were very sunny both days, but I spent a lot of timing riding a saddle that was in full shade, and then dumped out into a fully exposed bowl. My only basis for comparison is a pair of Spy Soldiers with persimmon lenses, but the Zeals cut glare better than the Soldiers (probably because of being polarized), and also provided better contrast in the shade. You can easily find them on closeout for $50 - $70. If you have some coin to drop check out the SPPX, with the spherical photochromatic lenses. I couldn't convince myself to drop 2 bills on them, but tried pretty hard.