Got to admit these problems with the ATi 4850's causing system crashes or lockups has put a dampener on my purchase. I have a few questions, but don't want to be seen as hi-jacking this thread. - Is the problem with the 4850's a Version 1 iMac 2009 problem? - So, is there a Version 1.1 or Version 2 iMac 2009 in the works? - Is it likely a heat issue or OS X issue? How long does Apple take to fix these problems? I certainly don't want my new iMac to be unreliable - I switched from PC's for the search of quality and stable computing. Plus I can't stand the look of Windows, and I love OS X and it's user friendliness. I am also strongly attracted to Apple's design. So, I'm hoping on some objective comments from experienced Guru's.