I had my first pair of Oakley Fives in 1998, and replaced them last year when I couldn't see through the lenses due to scratches etc. They did a cracking 12 year service, and stood up to everything that was thrown at them. I'm pretty sure I had the frame replaced FOC at one point too, but it was a long time ago.
I now have a newer pair (Fives 3.0), with the same black iridium lenses. A tad too dark for cycling (11% light transmission), but perfect for running and flying.
Money well spent. Less than 4p per day so far, and they get worn almost daily.