I went for the "low-tech" combo of short-shift manual, PSE (unplugged) and -20/LSD chassis .........feels & looks great. I guess it depends on your expectations of "sporty" and desire for something simple & pure (or not). Sitting in a friends car with Sport Chrono I was left in no doubt that it ruins a clean & classic interior. As for the Sport Chrono performance gains at this margin, much of it boils down to the driver skills for most of us !