Between me and my friends, we have bought about 12 hard drives in the past two months. The only thing we buy is Western Digital 120GB 7200rpm Caviar editions for anything big. Or for extra space we normally just add on a 40 or 60 gig HDD of the same brand.
I don't really know what you use the storage for, but a thing I have used lately and will continue to use from now on to put my hard drives in is a locking hard drive insert tray made by kingwin. It fits in a 5.25" slot on the front of your case, then you mount your harddrive in the included tray. Slide the tray in and lock it with a key. You can just buy the insert trays without the casing too so you can keep like 4 Hard Drives with different things on them, then just insert them into your comp when you need that specific data. The model number for that is KF-21-IPF and it runs about 20-25 bucks from most websites like newegg or zipzoomfly. That's not really what you asked about, but it's something that makes my life so much easier, as you can essentially have your information anywhere with you in bulk form. So, I thought I'd share that since I <3 it so much
