Corsair Air Series AF120 LED Blue Quiet Edition TWIN PACK 25.2 dBA 52.19 CFM 1500 RPM

Comment:
A good deal for two fans but make sure you undervolt. Colour is nice but note that the brightness will change with the fan speed as LEDs and the fan are controlled by the same voltage. As a vertically mounted exhaust fan, it is very quiet. When mounted horizontally as intake, it gets noticeably loud at just 700 RPM. Apparently this is an issue with sleeve bearing fans so be wary of what you want to use these fans for.