Why no Porsches? I can say that the Carrera GT is gorgeous piece of machinery. Not my favorite though. I'm going to go with a less-expensive car, but it's a bargain beast. The curves are insane, everything is so smooth, everything just flows so well and it has a very futuristic look to it. In addition, the performance is so crazy it often feels life-threatening. The car I'm talking about is the TVR Sagaris and it is my unattainable dream car.
My "attainable" dream car is the Lotus Exige S. It's not extremely pretty, it's a no-frills kind of car. But it has a very nice understated elegance, especially on the interior, which I am quite fond of. I'm somewhat of a minimalist and I don't like a lot of stuff going on at once (although that look on the Sagaris was pulled off perfectly)