Most of the people buying third-party 500 GB SATA/II drives for MacBooks and MacBook Pros are going for the Seagate Momentus or Western Digital Scorpio Blues. I was wondering what people's experiences are with the Hitachi 500 GB (5k500.B 2 platter, not the 5K500 3 platter). Newegg currently has a sale on the Hitachi drive for $79.99, cheaper than either the Momentus or Scorpio Blue. How loud do they get in a normal room setting and a silent room setting? Do they make constant clicking noises, parking their read/write heads? How's the heat? I have a 2 week old 13" MacBook Pro. My experience with the Scorpio Blue is a whirring/whooshing sound, sort of like a muffled crashing wave, in a silent room. I found the Momentus loud enough to hear in a regular office setting. I'm going more for silence than performance.