I've had 3 HDs in my mac now: The original Hitachi 250GB A 7200 500GB (can't remember which, but it was brutal on my battery) A 5400 500GB WD Green drive which is slow, causing problems, getting hot and I have to use a combination of downgraded firmware then HDPM + disabled drop sensor to stop the spinning ball from coming up all the time. Enough is enough, I'm now either going to put the original one back in (going to have to strip down some of the stuff as I'm at about 290GB used space) or get a replacement that will work. So that's the question, what will work? A Hitachi? Any help much appreciated, I'm going to order one today.