I would agree with geekazoid, car chases today have started to turn into CGI drift-fests, ripe with impossibility. This may make the occasional thrill, but a real one always tops it. That doesn't mean that there are no good car chases nowadays. The one in Bourne Identity was amazing, if only for the sense of desparation it conveyed. Bullitt was astounding in it's day for being a real car chase, with real cars, going real fast. And that is why it will always be the best.