Well if you're looking for an all around lens, go with blue iridium or pink iridium.
Both look great on the mountain and provide lots of light for overcast days.
Blue iridium lets in more light so it's better in overcast conditions but your eyes might be sensitive to light.
Pink iridium is basically the best bang for your buck. It looks sweet it lets in less light than blue iridium but it lets in just enough so you can see in the cloudy/overcast conditions.
If you're looking to swap out lenses my two recommendations are clear and Hi Yellow.
Clear is perfect if you're looking to do some night skiing as well. Clear allows you to see everything is any condition.
Hi Yellow is the absolute best for the cloudy days, but ONLY for cloudy days. It lets in to much light to be used on even partly cloudy days.