Hi, I've got iMac8,1 with C2D 2.8GHz processor. Recently, my hard drive broke and as my computer was two months after warranty I send It to local shop service and replace broken WDC Blue 500GB with WD Black 1TB. Everything works fine, a lot faster but the problem is, that iMac with old drive was absolutely noiseless - I even never heard writing head in HD. The WDC Black is louder at idle and when It read/write I hear pretty loud noise. Of course Its still more silent then the most computers, but I loved my old noiseless iMac. I consider replacing this WDC drive with another, more silent replacement - but I don't have idea which brand and model? SSD are still too expensive for me and I fear that 5400rpm drive will be too slow compared to original WDC Blue 500GB (which was 7200rpm model)... Hope you will help me in this decision, take care.