Gideontech reviews the Aerocool Turbine 2000 120mm LED Fan, which happens to have 16 blades.  It claims to provide about 37CFM at just under 20dBA.  Head over to check out this fan, and it’s blue LEDs.
“The Aerocool Turbine Fan comes equipped with a double layer fan blade design to improve air pressure. At 16 fan blades, it uses more than any other 120mm fan on the market. Originally I had thoughts to use this quiet but deadly fan in a mod, but decided to use it to quiet down a rackmount case.”

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