Any Serengeti frames with their Drivers Gradient lenses are highly recommended.
Brilliant in all light conditions, even flat 'grey/white' light, and work fine with glass cockpits.
I am also a fan of Serengeti Drivers and have used them for years after trying most everything else. However, I have noted one possible issue. When doing recurrent training at Bell in B407's equipped with night vision compatible instruments, the readability of the instruments is impaired by the the sunglasses apparently due to polarization of the Serengeti lenses. Not a factor in my routine flying, but may be for some.