MP3 Sunglasses

Oakley's Thump MP3 sunglasses, now available in 256MB and 512MB versions, ably serve the dual purpose of keeping sun out of your eyes while putting music into your ears. And they do have a sort of Riddick-like appeal. But are they cool enough to justify spending $400-500 on an undersized MP3 player and a pair of sunglasses?
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