My 2009 27 went into the shop two weeks ago with display failure complaint. They've spent the time replacing this and that, including power supply, with still no pinpoint as to the cause. I'll probably get told to replace the display at a cost of about $700. I'm prepared to do that, but if I have second thoughts, I'd want to get another iMac; important feature is FireWire, as my two external disks have my backed up data and I'd need to retrieve that stuff. How recently was FW discontinued, that I may find the newest replacement available?