I bought the ProGrips 3450 with the photochromatic lenses. I honestly, can't tell much difference. But I have yet to find any gogle lens that blocks enough sun to make me happy. At least with a full faced street helmet I could use a dark smoke visor during the day, and not have to squint. But I can't find any goggle lenses dark enough for my tastes.
2003 Aprilia Tuono