I would be careful on your decision. I had an a4 ultrasport, loved it. Last month it was totaled, and i picked up the mazdaspeed 6. At first i liked it, now im starting to hate it, i just want my audi back... nothing can replace the feeling you get when your driving an audi like that. The added power is nice in the ms6, but im not sure if im going to be happy in this car
Maybe this forum will be able to change my mind on how i feel about the ms6, im sure a few mods and ill be a little happier
Congrates on the car. Wait till you get your first maintanence bill, you'll be happy

I would try going to another deal for service after you get the first to fix the rust. The dealer and the service you get will make a world of difference.