Exactly what my dad swapped the diesel for, except in a sciroccoI wouldn't buy anything VAG 2.0 tdi.
Go for 2.0T instead.
I drove an A3tdi 170 this morning and it was incredibly dull. I was hoping the acceleration would be OK but it wasnt anything special. Going to see the one in the OP in a minute but cant see myself buying it. Is there such a thing as a diesel hot hatch with a fast engine but really soft suspension (she absolutely hates my 182 on bilsteins you see and wont use it)
As already mentioned stay away from the diesels unless you do the mileage. The corrosion protection on these are crap now pre 04 cars will last forever where as later cars are beginning to rust from the 5yr mark do expect rusting arches in about 2 years