Well I had Costas for couple years and mad the switch to Oakleys last year. Awesome move they have interchangeable lenses for different light conditions so you don't have to buy a lot of frames. I have two sets of oakleys with different frames but two other pair of lenses to go with them. As a matter of fact I have two pair of Costas I have been thinking of putting on community tackle box soon. One with blue lenses and other with green.
Blue lense with black frame ex-11 EX-Frame
Green lense are with Shark frame. Anyone interested?