I was using an old 74 GB Raptor as a boot drive on a shared family PC and it is to hard to keep people from installing things on the smaller drive. Besides it was outrageously noisy, especially when it gets close to full. So when Newegg wanted me to buy a new 500 GB VelociRaptor for $79, I just couldn't refuse.
This this is fairly quiet and very snappy but you can sometimes hear a little chatter noise. It does almost as well as some SSD drives I've seen and has a lot more space. Don't get me wrong, I'd take a good SSD any day but I'm very happy with this drive for the money.