I have an iMac and my LAcie external hard drive just failed. I need to shop for another drive. My iMac has Firewire 800 and usb 2.0. I was hoping to find a RELIABLE external hard drive that has Firewire 800 for use now, and usb 3.0 in case I replace this iMac in a year or two and still can use the same external hard drive. Not worth extra premium to find a Thunderbolt and Firewire 800 (if such exist) as I may never use Thunderbolt, but at least the usb 3.0 would give me a fast connection SHOULD I continue to use this drive later. As I read reviews, almost every make (Western Digintal, Seagate, Lacie, G-tech, etc.) has it's critics who have had one failure after another, and having had this Lacie failure and another Lacie portable drive failure, I am shying away from that. I was leaning towards Western Digital, but it seems in its line of Desktop drives for Macs they have Firewire 800 and usb 2.0 (My book Studio for Mac) and they have Thunderbolt but apparently nothing that has Firewire 800 (for my use now) and usb 3.0 (in case it is still working when I upgrade this iMac). Any suggestions for a RELIABLE desktop external hard drive already formatted for Mac, compatible with Time Machine, with Firewire 800 and usb 3.0 (as opposed to 2.0)?? Thank you!