Only TT in the mk2 thats worth anything is the RS, but then again mk3 is meant to be unveiled next year and released in 2014. Then there's rumors of a mid engined coupe as well for audi.
The TT RS can be picked up just under 30k now as well, wouldn't own the 1.9tdi or the 2.0tfsi's as every car that shares that 2.0 engine that I know people have owned has had more problems than they are worth.
My mates got a TT RS, picked it up for 45~k new a while back, its now in for a race engine rebuild.