What is the best front intake fans?

[Andy_C18]

Looking to get the new Coolermaster Master case 5 (Or the Pro version)
What would be the best intake fans for the front of the pc?
And should i get 120mm or 140mm fans?

 

[Andy_C18]

MERGED QUESTION
Question from Andy_C18 : "What is the best exhaust pc fans?"

Also what will be the best exhaust fan for the back and top of the case?
And should i get 120mm or 140mm fans?

 

[kanewolf]

One thread for your case fans, please. No need to separate into two threads.