In order to determine what the best aviator shades available are, one must determine weather quality is the only factor or if the quality/price ratio is more important. Brands like Ray Ban, Serengeti or Oakley are top-notch in the quality department, offering great fashionable shades that last for years, and their prices refflect this quality. As for less expensive brands, great shades can be found a good prices, especially if one is not concerned about wearing a designer brand. The good thing about aviator sunglasses is that their look has not changed much over the years, and so one need not be overly concerned about them going out of style.
Aviator Shades pictured: UB Mirror Lens Aviator 3-Pack w/ Drawstring Sunglass Pouches by Urban Boundaries Eyewear
Also of interest: Aviator Sunglasses Mirror Lens Silver Metal Frame 01 by Urban Boundaries Eyewear / Aviator Pilot Vintage Retro Turbo Metal Sunglasses A96 by Aviators / Ray-Ban ORB3449 Aviator Polarized Sunglasses