External HDD - My options?

[SideWinder]

I need to backup around 80Gb or so...just wondering about connection speeds (USB) and also which brand to go with?

I have my eye on...

Western Digital MyBook Essential 250GB USB2.0

http://www.overclockers.co.uk/showproduct.php?prodid=HD-083-WD&groupid=701&catid=14&subcat=801

Opinions?