Go Polarised!
Don't listen to the nonsense about polarised lenses. Anything that cuts down on glare and takes the strain off the eye is a bonus. Instrument displays only start to fade when you get to about 45 degrees head angle -and how many instruments do you look at at that angle? I use polarised lenses, the GPS is not a problem, and cutting out glare to see what's really there is a good thing.
Pitts2112