I've read through the sticky, which seems to be based on the B5 turbo'd S4. I've been looking a bit at the B6 but am having a difficult time finding out what I need to be careful of as I look around. My choice I'm thinking is between that, and a B7 A4 3.2. What are the big issues to keep in mind with the B6 S4?

 

Go to Audiworld or Audizine. You'll have better luck.