I'd say the answer depends on whether you (plan to) track your car. If so, I would recommend to go with one size wheel all around. I run 17X8.5 wheels with 235/40 or 245/40 on all four corners. Advantages are that you take some of the understeer out and can freely rotate the tires. For every track event, I simply put the "freshest" tire on the most demanding corner of the car!