I have 19" on mine and they are fine, no rubbing at all. As long as you stick to a maximum of 8" wide with a 235/35/19 tyres you should be okay.
One thing I will say is that the
lower profile tyres needed do make the ride very firm, If I had to choose again I think I would go with 18" as a compromise between looks and comfort.
Another thing to remember is the R has brembo brake calipers which makes fitting wheels a bit harder, they are quite wide and most of the time you need a small spacer to allow the wheels to clear.