K2:
For color, it's hard to go wrong with amber lenses. We have clear lenses around too, for when the light is hopeless. Some goggles give you both lenses.
The most important thing is to try them on to see which form the best seal with your helmet. If you are on the snow at night, your forehead will freeze if there is a gap. After that, go for price. Last winters models are still available, and cost much less. BTW, if you don't wear a helmet yet, buy oneto go with the goggles.