Greetings to Everyone. My '02 325xi in pristine condition was just rear-ended and is a total loss. I live in New England and am looking at e90 335xi as a next purchase. However, I do want to track the car. Can anyone share info about X-drive on the track? Do they hold up? Also, I've heard the turbos on the e90 335xi can be problematic. Thanks for sharing any info.