I had a sprint blue rs4 2 cars back. the best description of the exhaust note was "like a volcano making love to an avalanche." that engine was far ahead of its time and it took bmw and merc a couple years to catch up with their own versions. i still have fond memories of that beast. it did rely quite a bit on technology for its handling response though. even though most the V8 was hanging ahead of the front axle, the steering feel with turn-in tricked you into thinking otherwise. at speed though, there is no disguising the poor weight balance of audi's though. talk about understeer. most people did not recognize the rs4 as anything more than a modded a4, which may or may not be what you're looking for.
welcome to the club!
e92 m3 6MT, RS4 6MT, S4 Avant 6MT, WRX 5MT, Corsica