I didn't feel that the sport 500's represented that much of an upgrade over the stock turbos. Why spend a lot of money just to get almost the same car back? Spending the extra 1200 for downpipes and faster spooling turbos was worth it to me. Something else to think about; the price difference between the 530's and the 700's is "only" $200.00. It depends on what you want and how you drive the car.
