I've been considering putting together a NAS/media server recently, namely for backups and streaming movies and music across the network, but I'm not sure what I should use for most of the components. I was thinking that I would like to use at least three or four Western Digital Red drives (1 TB or 2 TB) in a RAID array (RAID1? 5? 6?). Ideally, I would like the form factor to be Mini-ITX, but would consider using MicroATX if absolutely necessary. A few cases have caught my eye so far, namely this Lian Li and this Fractal Design.
With that being said, I will need recommendations on a PSU, RAID controller, processor, and memory.