I have the Audi S3 8P brakes front and rear behind my 17" Monza's at the moment and they are fab, work brilliantly.
Because the front calipers are snug in the 17" Monza's, it becomes harder to get in behind the caliper when cleaning the wheels so i have to do a little manoeuvre of washing what i can then pulling the car forward to get the other half of the wheel that I couldn't get to by hand or brushes..
Not a big issue or downside, just more impractical when giving your car a wash if your fussy about keeping it clean.
Then again.. It gives you an excuse to get some new 18" wheels at a later date
..