Portable Hard Drive

I am am looking for a good External Hard drive to back up my Macbook.

A good Brand about 80Gigs and no more then $AU 110. If thats possible .

Macman

ps Is this any good, the 80gig for $91 :http://eshop.macsales.com/item/Other World Computing/MSU25080GB8/

Western Digital makes some great portable HD. you might want to check that out as well!!