Hi all, The HDD has failed on my 21.5" Intel iMac. It's out of warranty so I can't get Apple/Authorised Repair center to replace it for free. I've opened up/serviced a few macs already (including iMacs) before, so I'm confortable with the process. The only think I'm unsure about is which HDD to buy as a replacement. I know there are issues with the way these iMacs check temp, so the replacement drive has to be from the same manufacturer. But does it also have to be the exact same model? The current HDD in this iMac is a 1TB ST31000528ASQ. I've seen various 1TB Seagate Barracuda 7200rpm drives out there, but they don't necessariy match that exact model number. Is that an issue? For example, would this ST31000524AS or this ST1000DM003 be ok? Thanks in advance for your help.