I have a set in mine and have had a set for all of my Badman over the years. I'd really have to say that Ikon are a really nice high quality lense. Not quite like Oakley or Linegear but, #3 in my choice of them all.
While I agree that Ikon lens quality is very good, especially for the price, I don't agree with paralleling Oakley lenses with Linegear. Oakley is OEM, and everything else is aftermarket.