I wear Tifosi Tyrants. I am half Japanese, and the features of my nose and cheekbones are asian, so I have a difficult time fitting most sunglasses; the bridge of my nose is too low and they slip down and hit my cheekbones. The Tifosis are nice because they have adjustable nose pads, and interchangeable lenses are nice. I spent like $65 on my first pair, but have realized that you can order them for like $35 on ebay, which really isn't bad. I keep breaking/losing them, so I have a large supply of various lenses, which has sort of successfully locked me into this model frame.
I'd love to try asian fit Oakleys but no one ever has them in stock in a real store. I definitely need to try something like that out before dropping ridiculous buco bucks.
I also want prescription sunglasses (usually use contacts). The sportsrx ones look OK.