I've a bolle vermillion(pink) lense and then picked up goggles with a clear persimons lense and prefer that much more for night riding. It's MUCH easier to see detail with the yellow. Although the mirrored pink is fine for all around riding.
The VR50 Emerald Iridium is definately a nice lense but a bit pricy. Persimmon is definately a good all around lense. I have the fire iridium lense can can honestly say I hardly ever use it. Like someone else said, its only good on extremely bright blue bird days with absolutely no trees around. Also, the H.I. persimmon lense is a pretty good low light lense.