Might as well join the list. 20" iMac bought May 2008, died March 2011. As with others here, logic board failure after 2 years 10 months. I also didn't buy AppleCare as I had faith that a well cared for, expensive Apple desktop would last much longer than 3 years, not least as I also have a heavily-used 12" iBook still going strong after over 5 & 1/2 years. Big mistake! High repair bill means my iMac will be sold for spare parts as it's far better to buy a new desktop instead.
Great products when they work, which mostly they do, but a massive disappointment when they develop major hardware faults, be it for the unlucky minority. So much so, I'll never buy another all-in-one from Apple or any other company! May buy a Mini, but will also be viewing other options as ideally I need discrete graphics, yet the Mac Pro is both overkill for my needs & too expensive. Considering Apple's reputation for reliability, my iMac experience has been disappointing to say the least.
Message was edited by: jackdawsson: typo.