TC one of my fave shots was your old car against the same wall. I can see what you were trying to do by getting the sky in as well but don't think it's the best you've ever done. Photomatix is pretty good and something I've used in the past with my old compact.
I think if you hadn't lost the detail on the front bumper, it'd have been awesome.
Second one is great though. I just can't get enough of the black'n'gold!