These server PSU's are very loud so take that into consideration depending on where you will be running your miner.
I have ONE AND I am not impressed with it. My sea sonic came in I paid 99 after rebate I now have 2 of them this model
http://www.newegg.com/Product/Product.aspx?Item=N82E16817151120 I got two of these now total cost with sale and rebates 99+99 = 198
no one but no one sells a 1520 watt platinum psu for only 198 . right now they are running 3 s-1's 600gh pulling 1146 watts really nice for s-1s
I may add a few grid seeds to them as I have more power overhead may be able to run 25 grid seeds script only.
I am going to wait on the s-2's >I have 7 s-1's 25 grid seeds and 60 ant miner u2's about 1.5th plus 700khs all power used just about 3.3 k-watts.
would be a lot easier to run if I had 2 s-2s and 2 grid seed blades. I am going to sell off all the sticks to order a blade.