Good choice. I hope I wasnt too hard on you earlier.
Fuck the nay sayers, a turbo kit = more tq than most V8s on 1.8Ts. They are beastly...a small 4cyl making more tq than engines 3x their size...
Get a chip no matter what you do to get better mileage and 50HP or so. Theres a GT28RS kit out for A4's and B5's (Passats and Audi's) that makes 295 AWHP and 328 AWTQ, so image what it would do on a 2WD 5spd. The kit wont work for GTis, but if you use the same stuff... then you are looking at ~12s at least in a good daily driver.
Heres the link:
http://www.atpturbo.com/root/releases/release050304.htm
And the S in "GT28RS" is for "quick spool" so the application is still practical. You'll love never having to drive that slow ass Focus everyday. I know I hated it