You need more options on your poll!
My choices would be different.....
Top Speed: I would say Buggatti Veyron or Koenigsegg CCX!
Otherwise: Saleen S7-TT or Mclaren F1!
From your list I think the Porsche has the looks but the Enzo performs a little better. However for a daily driver, the SLR would probably be the better of the three. You can't go wrong with any of them really.
