Dahaka

Hi, I'm looking to buy both front and rear brake discs and pads for an Audi A5 2014 2.0 TDI 177bhp. On any part seller they have multiple brake discs and pad sizes and im confused on which part i need. I've attached 4 Images which shows disks and pads that have disc mm of either 320 or 314mm. Which one do i opt for? if i get 320mm discs does it have to match with a 320mm pad or will the 314mm work? is there a general rule of thumb? also are the larger pads and discs considered stronger brakes? Thanks for any answers

I have an Audi A5 2014 Coupe S Line (2.0 TDI 177HP) I can't figure out which rear shock absorbers I should be buying do I need the one with sports suspension or not? I'm not sure what I have currently, will either work fine? I've been looking at Euro car parts only at the moment, any suggestions for other websites or a certain brand of shock absorbers are welcome. (I've heard Monroe is good)