Two things.
A) Great thread, I always wanted to turn a 3.5 X1 into a track monster, but ended up doing it to an F80. Lovely car, glad to see you pursuing your driving passion and not caring what others think. I'm sure there's plenty of snotty people who think "Who brings an X1 to the track?", only to end up being passed by you. Love it!
B) In regards to the post above me, not to say that it is everyone, but in general the most aggressive/worst drivers are always driving a Corvette.