Just FYI, I do photography and have a 2TB usb 3.0 HDD to store everything. Along with 1080p SLR video, the files add up fast.
As far as my gaming computer goes, 500gb is probably plenty. The 250gb that I have right now will probably be just fine for the time being as well.
I've been tossing around the idea of a SSD. However the price seems a bit excessive for the benefit. I'll either continue to use my 250, or snag a 500 for my next build.
I'm more asking about the RAM and Video Card...