I have recently made the switch to Costas (580p lenses) and really enjoy them. Previously had the Smith Optics with Chromapop. They were nice, but the Costas are a step above in my opinion.
Not too long after purchasing my Costas, I left them on the back of the 4-wheeler and the lenses got scratched right in my line of sight. I was able to order a new set of lenses for 40 bucks which was great as the frames are basically new.