What case is it for?
Do you have a fan controller?
Either one of these will do, the Phanteks one is also in available in another colour and LED variants.
My basket at Overclockers UK:
- 1 x Noiseblocker BlackSilent Fan XK2 - 140mm (1100rpm)= £8.99
- 1 x Noiseblocker BlackSilent Pro Fan PK2 - 140mm (1200rpm)= £11.99
- 1 x Phanteks PH-F140SP 140mm Fan - Black / White= £12.95
Total: £38.59
(includes shipping: £4.66)