definitely no from me on the HDR issue. If the picture featured a particularly detailed background then perhaps, but given that the car is a fairly straightforward colour, I think it is best as it is?
The Karmann Ghia is a difficult subject as it has quite soft lines, but the lines are a major feature of the car.. I order to capture the shape of the wing, you've gained a dull shadow on the nose (arguably the coolest bit of the car) Also the reflection of the garage on the side detracts from the sharpness of the image. The original image lose all definitions of the lines, the front of the car could be flat and the shape of the wing could be a stripe?
I like the angle of approach, being low down captures the lines nicely, perhaps being further back would get the whole nose in and create, admirably a more conventional image, but also capture more of the detail of this lovely car.
Sorry to be really negative, I do like the picture, and i like the idea behind the HDR images, but I think maybe its the wrong subject?