I dont even bother with a case or protector anymore.
Want to feel the thin-ness of the phone and also the smoothness of the screen.
I did have 2 spigen glass protectors which were amazing, but any glass protector now would nullify the beautiful rounded edge feeling so I'm holding off. Have picked up quite a few small-light scratches, but they can't be seen without looking hard at a certain angle and aren't noticeable with the screen on.
Spigen make glass screen protectors with a rounded edge, they have an r at the end of their designation, the r stands for radius iirc I'm sure they'll make one for both iphones they also make plastic protectors called curved crystal that fit perfectly over the edge.