 I recently traded in my '14 Audi A6 Prestige (which was a great car) for a '15 S3 Prestige. There is certainly no doubt the S3 is a heck of a lot more fun to drive! Power delivery is excellent...although there is a small bit of turbo lag (esp. in regular "D" mode). I think a 7-sp DSG (like in the S4) would've been better.  Grip is outstanding and the car handles like it's on rails. Braking is outstanding as well. I didn't get the 19" wheel and performance package because I live in Chicago where the road quality can be hell. Some of the cons for me are the lack of storage spaces (for sunglasses, etc), no memory seat settings, no built-in garage door opener, and no heated steering wheel. 