Pagani Zonda F
Enzo Ferrari (F60)
Porsche Carerra GT
Mercedes McLaren SLR
These are probably the six most undisputed supercars at the time of this entry.
A supercar must have a speed that will not be matched by any normal road car. This basically means faster than top-spec beamers or so. Roughyl 175mph.
Supercars are excellent in every aspect- except cost.
Tuned up sports cars are not supercars. They will fuck out quickly because they have the lifespan of a house-fly.
NSX or similar are not supercars. There is no such thing as a cut price supercar.
To qualify, modern supercars would have to be around the 200mph mark. As you may notice, this does not automatically include all ferrari's. The 166 inter struggled to make 100mph.
A supercar is something that few people will ever drive, and fewer will even own. Basically, unless it smokes practically everything that isn't tuned to fuck, it's good.