See rig here. It is the first one there, Able. I plan on adding 4 more drives, most likely not raided as it would require the purchase of a new motherboard. I don't think my Antec 500W will quite cut another 4 drives (most likely WD500AAKS), so I was thinking either SeaSonic S12 or OCZ GameXStream. I know OCZ is pretty good and SeaSonic's are a bit better, but what is the difference between the two?