I stopped at the LSD. Although I do track the car twice a year, and do an occasional auto-x, this is my daily driver. Any other mods will take away from the generally nice comfortable street handling of this car. They might make the car 'better' in some way, but it will subtract from comfort.
I also aim to keep the car in F Street class for auto-x. The LSD is the only mod allowed. This also has the major side benefit of keeping me from spending a lot of money on suspension parts for the car. Which is more money for track time, tires, and other fun bits.
