ditto on Saab
I can fully endorse what Saab has said re Iomega. They are a like a box of chocolates, except instead of chocolates you get something else, brown also, but not as tasty. I've heard more anguished data screams regarding same than I hope to remember.
I've got good results with Seagate and Hitachi.
Make sure you have a good backup policy: Personally, I would buy an empty external case, and the drive separately.
Place the drive INSIDE THE PC periodically for backup/mega size data transfer, (even with USB 2.0 it still takes a long time to transfer 30gb -much more 1,000 gb!)