Re: [Guide] Dogie's Comprehensive Bitmain Antminer S7 Setup [HD]
Some alternatives, they're all (relatively) quiet and they're all rated @ +130 CFM... works great on S5 and Spondoolies 
http://www.silverstonetek.com/product.php?pid=711&area=en
http://www.enermax.co.uk/fans/twisterstorm/
http://www.scythe-eu.com/en/products/fans/ultra-kaze-120.html
PS: I haven't tried the SilverStone yet!
http://www.silverstonetek.com/product.php?pid=711&area=en
http://www.enermax.co.uk/fans/twisterstorm/
http://www.scythe-eu.com/en/products/fans/ultra-kaze-120.html
PS: I haven't tried the SilverStone yet!
Those looks like good alternatives, thanks for the suggestions.