Rapha, nice but a bit pricey?

Okay, getting tempted by the Classic glasses. I'd go into the shop to try them on as they look like they might be a bit too Dame Edna on me. But other questions:

• I have approx -5.75 prescription, I always go for a medium-high index lens, I don't like the thinnest, highest index one. Will the frames tolerate a thick-ish lens?
  
• are they noticeably wrap around, or do they work as normal every day glasses? Not sure at the moment whether I'd want for my normal clear pair, or to acquire my first ever pair of shades. The obvious answer is one of each, I know.
  
  

Stupid question maybe but are there any issues with wearing shades such as changing light conditions, going inside etc, bearing in mind I can't just take them off and see normally. I imagine I'd always carry regular glasses too, but it'd be a totally new thing for me.