the audi is nice but i would suggest vw over audi if you are buying for the motor... in the 1.8t i would say go fwd > awd unless we are talking TT; even then justifying the cost vs. speed/pwr... go VW and fwd.

you can easily attain 1.9 60' w/ fwd, my little k03 was a few shy of 300lbs so you can make quite a bit of pwr w/ stock turbo.