Yup costco all the way. They come in two shades. I have one of each. The light tinted ones work well in low light conditions. The dark rose tinted ones are to dark IMO. I'd get two pairs of the light ones next time. I find they rarely fog and field of vision is good. All around for 40$ about the best deal going.
Also got 2 pairs at Costco, in my opinion any goggles get scratched pretty easily and better to replace them as often as possible. Btw I,'ve noticed lenses from Costco goggles can be taken off but I couldn't find any replacement lenses for them, any ideas?