I'm a bit late on this one, but Audiholic, great review man!
Thanks for the photos and the little movies... The RS4 looks stunning, although for some reason I like it more in sedan outfit. The B&O sound system is very impressive. I remember sitting in a regular A8 (previous generation) on the Motor Show in Brussels in 2000, while a salesman was demonstrating its sound system, and I was also blown away by the overwhelming but clear sound coming from the speakers all around me. I even don't know if it was some kind of upgraded system, maybe it was the standard audio system?! Anyway, thanks a lot for sharing your experiences!