i have 320gb and im going good..but 1tb is nice to have =]] you can get it alot cheaper for 400. you could probably get 2 for that price. if your intersted ill find some and pm you the site.
1 TB = 1000gb. .
Its only worth it if your going to use it. How big is a movie a few gigs? If your going to be downloading hundreds of movies then get the TB. But I really don't think you will use that much and for much cheaper you can get a 500gb.
http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=3116643&Sku=TSD-500S
Or you could just spend that money x2 and buy twice that.
im looking for something i wont use all of xD
The max I'd pay for a TB is $300, if you can't get it for less i'd buy maybe 2x 320GB or 1x 500GB?

