justinkim
If you're going to be spending money on an OTS NAS box, I think it makes to spend as much as you can on a quality, well known machine. Unless the data you're going to be storing is incidental, it just isn't worth risking data loss on less reliable hardware and software. NAS boxes tend to be fine until they aren't. When they do go bad, best case scenario is that you can move the disk pack to another device. Otherwise, you're SOL unless you have a backup.
I run a couple of Synology 1621+ NASes, one a backup of the other. I've come close to losing data when some older Drobo boxes went bad on me. Having a backup is what saved me.
Also, remember - RAID is not the same as having a good backup.