The radarlocks are an awesome upgrade from the radars. I read that the radarlock lenses have the same coverage as radar lenses. The path is a great looking lens that I have because I don't like the frame or the lenses touching my cheeks.
My vote goes for the Path, but the best way to tell is to try them on. I think the different sizes are made to appeal to people with different sized heads. Bigger head=bigger lenses.