1) Maxtor 1TB External Hard Drive USB2.0 32MB Cache - Retail Maxtor Basics - £67.99
direct link - http://www.ebuyer.com/product/142563
2) Seagate 1TB External Hard Drive Hi Speed USB - Retail Expansion Piano Black - £68.86
direct link - http://www.ebuyer.com/product/160904
3) Buffalo Drivestation 1TB External Drive TurboUSB With Power Saving Mode - £68.99
direct link - http://www.ebuyer.com/product/150558
i've owned 2 of those buffalos and so far never once either of them let me down. data transfer rate also quite good (upto 50mb/s) . silent runner, robus design, auto sleep mode works really brilliantly and comes together with free backup utility software.