I had an A6-99' and I miss that love-hate relationship. Great car but unfortunately too many small things.. Then its not cheap to maintain.
Don't buy without warranty and save $$$ to do the timing belt+water pump+turbo+control arms+fading display clutster which are the most common issues. And by the way don't expect to find a forum so rich like this.
www.audiworld.com is the better one but still too many guys asking if their signature is cool and asking how to chip dad's Audi. :-(
-Jasper