I love trance as well, especially in the car!
I think "That Guy" is right about this study, I seem to get a bit too much adrenaline pumping when I listen to trance in the 500......and trust me it's hard enough not to go fast even when your listening to reggae.
I was pointed to a website by one of the members of benzsport for a trance radio station, I can now download all the songs using streamripper and convert them into CD's. Can't wait to get a MP3 player in the car and have 400 songs on one disc! You gotta love the internet for that.