Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
I've also had to have Apple replace my X800XT after the fan got really 'grindy' , it seems the fan bearings are of very poor quality. Still, it's quiet for the most part
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.