Wow I don't think I could spend $100 on flip flops, much less $200. The pair I own are Reefs, and I almost never wear them now because I can't compare walking in them compared to my Tevas.
I'm torn between Costas and Oakleys for my next prescription pair. If I did more fishing like I'd want to, Costas would be an easy choice, but Oakley has better frame options for cycling and more activities I do.