That's what I was getting at. Something to sit in a corner collecting dust holding storage really doesn't need to be so expensive or fancy. My file server consists of a bent case that was dropped, a cheap board, a 6000+, and a ton of space.
Exactly. As long as you have a lot of storage space and a good quality RAID card, the rest of the components can be fairly low-power; after all, since it's a server and it theoretically should be up all the time, you'd want as low-power as you could get to cut down on electricity costs.