Nice GTR and the HDR's so subtle I almost don't notice it! Personally I think you could intensify it just a little bit (but DON'T go overboard ) I think a different angle may have been better, one that wouldn't include the fencing and the two other cars.
You could have shot this on such an angle that you wouldn't have been able to see any of the other cars in the background, which would be a great improvement.
Nice shot! I was at a charity event last weekend and had the opportunity to drive a '09 model. It was by far the fastest car I have ever driven...faster than the 360 Ferrari (rental).