Speaking from experience it is cheaper to buy a NA and turbo it... The TT cars are just WORTH so much money and it has very little to do with the movie. Now the movie did boost the value some because it brought attention to the car from people who had no idea before.. To answer the question you have to decide what you are going to be doing with the car.. The GTE and GE engine are both extremely strong engines.. Both can handle a ton of power out the box... The TT car will have better brakes, tranny, etc.. all of which can be added to a NA later..