Don't get a B5 S4...Although they are sweet looking and easy to mod, they are also some of the most unreliable Audi's ever made. That car will **** every penny it can out of you. The C4 S4 (technically an S6) is MUCH more reliable, although mine hasn't really proven that statement lol. I'm just bad luck when it comes to cars...
I would definitely turbo an R32 if I were you...you are very much like me, meaning you love European cars, AWD, and turbo's.
Check out some Subaru Legacy 2.5GT's or Spec. B's and Audi Allroad's.