masterwit's Journal: Question: storage, backup, and the affordable solution

Here is a question to anyone who is willing to provide input:
After recently experiencing the "joy" of a PSU trashing my 2 hard-drives and losing all my 1's and 0's, I am searching right now for a "backup storage solution" to avoid this fallout in the potential future. However simple this may seem, I am looking for an independently powered backup (RAID 1 is useless if the PSU goes beserk!) Additionally I would prefer at least a 2TB backup size. My question is what is the smart solution?
(A) an external enclosure that could support multiple drive bays (must be independently powered) that runs of e-sata or usb
(B) network attached storage, although I am unfamiliar with the performance of this alternative
(C) building my own case, adding some type of power supply and cheap processor,etc, and then putting this on the network as a computer devoted to storage
Any advice to a modern day affordable solution or even an alternative that I did not present above would be greatly appreciated.