Zalaman CNPS10x FLEX Fan help!!

So I just picked up a CNPS10X FLEX for a recycle pc store, but it came with no fans =( so I am wondering which fan I should pair it with. I know they fit 120mm Size, but which ones?? I plan to mount it on either a 2500k, 2550k, 2600k, 2700k and may do some overclocking 4.0-4.3 Ghz.


Here is the heatsink
http://www.newegg.com/Product/Product.aspx?Item=N82E168...


Any recommendations would be appreciated =)