I second Sierra Trading post, I got a nice pair of Costa del mar's the one that came with interchangeable lenses (amber, grey, and yellow, all polarized) for about $62.
I love em
I've got a pair of Costa Del Mar glasses. Good stuff right there. The ones I have are somewhere down on the cheaper side of their line. My mother spent some ridiculous amount of cash for her Costas, but I can say that they are worth the money. Good glasses.