I'm Matt. 2008 SGM 135i convertible. Car is still a work in progress from a mod standpoint. I am focused more on performance mods as I autocross a couple of times a month and also do some track days.
For a meet, I am at the BMW CCA autocross every month. Best place to see what your car can do at the limit. What is the point of performance mods if you cannot test them out?
Pic is from the Reno Balloon races last year.