Hi all, I've done some research on external drive recommendations here. I've read the buying guide thread and most of the threads that it pointed to. I have narrowed it down to an OWC: http://eshop.macsales.com/shop/firewire/usb/eliteclassic or one of the WD with fire wire 800 or building my own with a WD green drive. My main priorities are for the drive to be quiet, cool and very reliable. I will be used only to back up my 1TB iMac i5. I am leaning towards building my own so...My questions: 1. In terms of best reliability, what are the different classes of drives. I've heard of the term "enterprise". Is this a higher grade of components? How can I tell from looking at newegg.com which are the "better" drives? I would be looking at WD, hitachi and seagate, with preference in that order. Those seem to be the leaders. Any guidance you can give would be appreciated. 2. Once I pick a disk, what else will I need? I've never built an external drive before so need some help/advise. I know I need an enclosure but not sure if I need to purchase a controller, etc, etc. Which enclosures have good cooling? I am thinking of strapping the external drive to the back of my iMac stand. Thanks for your help and advise.