Being that the only functional difference between the E430 and the E430 Sport is a set of 17x8 wheels with (usually) ****ty Goodyear or Conti tires I would opt for the regular E430 then give Luke a call before I was through the first tank of gas. You could buy whatever wheel/tire combo struck your fancy that would handle much better (given the kind of rubber I would buy vs what is offered with the package) and still come out a couple thousand ahead of having a Sport. The bodywork doesn't do as much for me, especially after the recent cosmetic overhaul of the E-class lineup. Save the original 16's for winter, driving school, long trips, etc. Hell, buy the regular E430, call Luke for wheels/tires, then GO to driving school on the difference in price. Now THAT is a functional upgrade to making you/your car go quicker and handle better.

Just my semi-twisted thinking....Lee