215/35-18 . Anyone have any experience with the two?
Also, aside from the looks on the 18's, would 17's be a better choice?
I've had the 17" runflats before but want regular perf. 17s or 18s. ?????

 

With 18's Mini sells a kit to limit the steering to eliminate rubbing... no idea if you NEED this though.

Larger wheels don't necessarily mean more corning force or better handling though... it will let you put larger brakes on though, but both the larger rotors and larger rims usually increase unsprung weight, which makes handling worse.... of course, it you are going up from the "no-so-mini-lights" at 22lbs @ to 18s that weight 17lbs this argument is mute...

stricktly from a ride perspective, the 17s will have more sidewall flex and a softer ride...

HTH.