Can anyone really speak to how much difference there is in terms of ride quality between the two? I have an Arc and finally just ordered Aero wheels and am a bit concerened about the change in ride quality as I am in Chicago. On the other hand, the look of the car changes dramatically with the Aero wheels and the lower profile. Is it the rims that make the biggest difference, or is it really the tires/sidewalls that cause a much harsher ride? All your thoughts are appreciated.