Go try some on and find a pair that fits you best. You'd be surprised on how much they vary. Lens quality is the same as sunglass quality. Do you want a $10 pair of sunglasses or do you want a $150 pair of oakleys? Personally, I always buy the higher end goggles, take care of them and they'll last you a while. I prefer the Smiths because of their frames and they make good lenses. A few of the goggles are now coming with extra lenses included wich is an excellent idea and should have come out years ago!