For my birthday this year I'd really like to ask for a pair of Oakley Radars, preferably polarized (my Dad says he can't underscore the importance of polarized lenses enough). However, the problem is that my Dad said he wouldn't ever buy Oakleys and says a $50 pair of polarized sunglasses would be just as good. What is it specifically about Oakley that makes their lenses so much better? I'm trying to tell him that Oakleys truly are the best and that the price is justified. Any input would be greatly appreciated. Thanks!