I have 19's and considering dropping back to 18's due to many factors such as handling, ride quality, tyre prices, rubbing etc
I concur, i have run 225/45-17 on 7,5x17" ET 51 but feel the car looses out on steering feel, also had 235/35-19 og 8,5x19" ET 48 although it looked great i found my rimchoice to heavy and at trackdays there wasn't to much room in the wheel arches. I currently have 235/40-18" on 8x18" ET 50 front and 225/45-18" on 8x18" ET45, i find the 18" is the swwet spot on this car, handling wise, weight and brake clearance is where i want it to be.
I must admit i'm getting tired of the nonsense that higher profile tyres offers more comfort
a higher profile offers uncontrollable suspension, whereas the lower profile let's the advanced suspension do it's job and let's the tyre do the grip that is it's job.