I got a Agility 3 120 GB and never looked back. Unless you're storing a server full of prawns or pirating Blu-Ray movies, or you have some other special circumstances (specifically where you'd need a pile of storage, such as a server) you don't need more than 120 GBs. This is a fact. just delete programs/games you don't use very much, and if you have music/video/pics you need archived, put em on DVDs, Flash media or the like.
I hate it when people are like YEAH I GOT 7 TB OF STORAGE IN MY LEET GAMING RIG!!!
Well what good is it going to do you other than having the most cluttered PC in history. Just manage your data intelligently and you'll never have any need for anywhere near that amount of storage.
\rant