I live in eastern Canada so I have a a set of both summer and winter tires mounted on rims. My summer tires (Potenza RE050A) are just about dead so I have to replace them. I don't track the car, I just like driving a small spirited car as my daily ride. My last ride was a Cooper S. My mechanic had suggested either the Michelin Pilot Sport 4s or the Continental DWS06 while Tire Rack seems to be leaning towards the Pirelli P Zero Nero or Vredestein Quatrac Pro all in 205/40R 17. Can you provide any recommendations, and can I change the size to 215/45 17 without any rubbing as the potholes up here are brutal. Thanks,