You don't have to spend that much to get something good. I personally love my
Dirty Dog 'SPIN' glasses. Check them out at
dirtydog.com. They're polarized and they retail for around $70. Dirty Dog is a Downunder eyewear company that makes stuff every bit as good as (if not better than) Smith or Oakley or any of those and at a lower price point. If your face is normal-to-narrow, the Spins are perfect. If your face is a bit broader (wider), check out the Buzzer. All have awesome wrap to keep the wind off your eyes.
You can purchase straight off their web site or from a dealer. They're a little hard to find in the States, because their emphasis here has been more toward water sports up until recently. Definitely check them out.
EDIT: And yes, they
are one of my sponsors
