Ignoring the rubbing issue, you shouldn't go over 215/45 on a 7" wide wheel for safty reasons (and it will handle bad).215/45/17's are best for traction (lots of meat) and looks (fills the wheel well)205/40/17's are best for handling (less sidewall flex) and acceleration when already rolling (lighter)I use the 215/45/17's.
Joel Baldridge, ASE Certified Master Technician, Audi Certified Expert Technician