I used the customer reviews off Amazon in deciding what hard drive to get. Reliablity, functionality and space ar all you really need to worry about. You will see the bad reviews are mainly hard drives that have failed or been faulty. I went for and still have functioning perfectly well, a WD MyBook.
You could future proof a bit more & go for a sata III drive http://www.ebuyer.com/product/252858 In the future you may upgrade to a motherboard that has a sata III socket