I should add that as a result I don't like the other three, because I don't like the original car, but I think Joecinq's take on the modding is excellent and very original and it's nice to see Luke's original choice with the Bigfoot conversion.
They are all well done, except for my lack of completion and they all show a very different take on the modding challenge, which I think is nice, there is certainly variety from only four entries. It's actually quite difficult to compare them with each other, so I guess it's just going to be a question of what people like and what skill they think was involved as well as what they look for in a modding challenge.