for outright exclusivity, the CCX is hard to beat. It also has a higher top speed.
I can't attest to it's handling personally, nor the Enzo's, but both are phenomenal on the track, though the Enzo is a bit rough on the road from what I hear.
I personally like the CCX's styling better, and the doors are possibly the coolest thing ever, lol.
They also make a "Green" version of the CCX, which runs on ethanol. It actually makes more power than the standard car, to the tune of 8-900 i beleive.