Ferrari Enzo Vs. Saleen S7 Vs. Mercedes benz Slr-Mclaren Vs. Porsche Carerra GT?

1st place?
2nd place?
3rd place?
4th place?

Top speed (of 4 cars)?
Prices (of 4 cars)?
Looks better (in your opinoin)?
Most exotic (in your opinoin)?
Which would you buy?