If you plan to buy an iMac G5, you should know that the internal power adapter's fan is known to be weak, and could start doing weird noises only a few hours after the first use of the computer. I said "known" because I am right now on the phone with Apple and the store where I bought the iMac told me Apple knows well about the problem and already has a free exchange program...

Update: Apple France just lost a customer... So they knew VERY well about the problem, they have dozens of iMac G5 power adaptors that are ready to burn if the fan dies. My mac was probably assembled last week, delivered this week. So they intentionally left the bad quality's power adapter and left the customer - and the resellers - in front of the following dilemma : you bring your iMac to Apple's customer care center in the far south of Paris or you do-it-yourself, Apple sending you a replacement part. You can't get a technician's visit to do it. For a new machine, just acquired, facing a construction problem, that's a real shame. BUT to receive that replacement part, you need to provide Apple with a credit card number, they refuse to ship w/o that "because a lot of people abused"!!! Hey, so that's Apple that delivers a bad quality product, but *I* have to give them a proof I am an honest customer who'll sent back the bad part... Very cool, Apple, you're so polite with your customers. So I gave a credit card number, and I will send a letter Recommandé avec Accusé de Réception requesting the removal of my credit card data from their files as soon as I have sent back the bad power adapter; that's legal in France and they must remove my entry. If they don't, I will call the regulatory authority on privacy issues and I'll sue Apple. And of course Apple France just lost a customer today.