This is the sound that awaits you in the R8, Ron and Kreso

http://www.youtube.com/watch?v=qPM4JvZLSlI

Also check the other videos from the (swedish) testdrive of the Avant in the menu on the right.

I think the Avant is the best looking of the RS4s, and what a way to drive the children around
Just make sure you get them neckbraces to cope with the necksnapping acceleration

The whole report:
http://www.germancarzone.com/showthread.php?t=6074