Thank you. I apparently was having a momentary brain lapse. This car is just so much fun to drive! And I can relate, this is the first car I've kept longer than 4 years. I am seriously considering a AWD swap from a first gen A3 2.0T Quattro. Looks like a pretty straight forward job.
Unless you are mostly interested in drag racing (launch) I probably wouldn't do it. I thought about it but I track (road course my car) and with an LSD the car is transformed. Other than K04, single best mod you can do is an LSD.
I went with an LSD and track tires (seperate set of wheels/tires) and the difference is HUGE on the track as you would expect. You have to recalibrate you head the first time out because the limits and capabilities are so much greater.