i just bought the imac 21.5 inch with ati radeon 4670 and the base spec. after few hours of playing with this new toy. i realise that when you press the shutdown button, it will put the imac to sleep instead of showing the shutdown/restart option that i have on my macbook. Is there any way to make it work like a macbook power button. secondly, whenever my imac wake up after sleeping, the fan will run faster and automatically went to sleep again. this issue just keep repeating itself. i have no choice but to shutdown the imac and boot up again. Thirdly, i try the machine on WoW and i realise that the sound is rather choppy . Anyone know the fix for the above problems?