One tip if you go for a roadster - check the rear canopy for any signs that the glass is coming away from the canopy.....he says embarassingly having missed it himself. Found a few forums posts on the topic, so much happen now and then.
There is no need to buy an ex-accident car I think, there seemed to be plenty of clean 01's and 02's out there (at least a few months ago when I was looking and using CarFax).
I think quattro vs 2FWD, roadster vs coupe and mileage are the main price setting variables, not sure of how much they add on for baseball finish, but it looks great no matter what! Good luck and enjoy shopping around for your TT.