[ZeTurbo]

The Golden one, in the first pic posted by Il Duce seems to be coolest to me. It would do justice the the Esprit name.
Allthough, looking at the current design drirection lotus has taken, it seems like the 2nd and 3rd pic are closest to any sort of finished product.

As Exige said though, they are both computer generated and probably very far from anything likely to come out of Lotus.