got a pair of frameless tifosi currently and some older frameless oakleys as backups. have a older oakley pair that aren't frameless
that i'll only wear when i can't find either of the other two options. the diff bewtween framed and frameless is huge. that quick glance back
with framed glasses to move out of the bike lane/switch lanes can hide an entire car/motorcycle/ped (much like a car windshield post) depending on the angle.
the frameless allows you to pick it up and is worth any extra $$$ imho.