Hitachi or Seagate? When you upgrade your MBP to a 200 GB 7200 RPM drive are you all getting Hitachi's or Seagate's? And if Hitachi - how loud is it? Can you hear the hard drive head click? Or worse can you hear the arm park (kind of a thunking sound - happens when your drive spins down - you always hear right before your MBP finally goes to sleep).