I did not know if I should write this story, but being a Mac fan does not mean being blind and not criticizing Apple when it is needed.
So, Last week I have received my iMac Core Duo; and as soon as I turn it on I thought that it was rather noisy, quite unusual since everybody is recognizing this computer to be silent. So, I called the AppleCare and obtained without any problem a on-site exchange, since I had the computer since less than 7 days, it was mandatory by the law to get it exchange (in France).
So, I had to keep the first computer while waiting for the new one to come. While using it, I looked more carefully at it, and I noticed than the bottom side of the iMacG5 was maintain via 7 screws, but only 5 were present...
I mentioned this point to the AppleCare, together with some weird "sudden reboot" events happening randomly, but they did not want to comment.
I also experienced a problem with the poor Wifi transfer speed as already mentioned on your website. I was patient, but my brother not, after facing a faulty keyboard shipped with his iMac 20" and a poor wifi transfer speed, he has sent his computer back.
Hereafter is the second part of the story:
I received the replacement computer, the HD has been changed to a WesternDigital (the Seagate is apparently responsible for the noise...).
One can notice while reading different forums, that despite its overall quality the iMacIntel has some small problem either due to hardware/software optimization, and manufacturing/quality control failures.
The AppleSupport/AppleCare is as usual efficient but Apple should pay more attention to its manufacturing quality control
