We like the Smith Pivlock Overdrives, which allow you to swap out lenses with no drama at all. What's more, the Smith's are incredibly comfortable (even the non-slip nose pads are adjustable) and mate well with a wide variety of helmets. Good eye coverage, easy to tailor to your tastes, excellent optics...the Pivlock Overdrive has a lot going for it.
Bike Mag's 12 Days of Christmas Gift Guide
Bike Mag's 12 Days of Christmas Gift Guide