Need help finding a good case fan

Hardware Hub Cases / Chassis
1

a good 140mm led prefer blue or green colors thanks 

2

the corsair 140mm af series is great but if you prefer led then nzxt FZ-140mm LED is good!!

3

The silverstone air penetrators (ie non static pressure version) are great at directed air flow take a look at the AP123 and AP141. Also agree with crosscode on the corsair af series. 

4

If you're looking for a 140mm fan, then these look really nice:

http://www.newegg.com/Product/Product.aspx?Item=N82E16835233096

5

those are round air may get out i have a 

Fractal Design Define R4 you sure its a good fit for back of the case