Fairly cheap ones with decent lenses (I re-bond them in permanently). Never had good luck with premium Oakleys et al, although I have quite a few lying around. Recent brands I've visited are Smith and Dragon.
http://www.smithoptics.com/
http://www.dragonalliance.com/products/sunglasses/
http://www.smithoptics.com/
http://www.dragonalliance.com/products/sunglasses/