I’ve done 40000 miles in my non PP Mk7 GTI, obv driven all conditions, the car is faultless, never missed bigger brakes etc.
Watch out for Jap spec, I think they may also have manual handbrake, no electric, could be wrong.
Yes the German spec GTIs offered 17 inch alloys, I wouldn’t worry too much, as diamond cut are nice, but a pain if they get white worm, they need pro refurb. Mine have all had to be refurbished, it’s par for the course.