My current fan is this. 120mm. I will rate it:- In terms of cooling: 6/10. Noise: 10/10. I am looking for a fan that will give me more cooling but not go above 21dB (I know every company has different ways of testing). At the current moment, my PC is whisper quite. I like it that way and I dont want much noise. Now, NOW!, before that, I need to know about air pressure and all shenanigans that come with it. Most say, that, for this setup, any fan should do because you need a fan with good air pressure for heat sinks only. Isn't this setup like that?. I mean, the 'things' to cool are pretty close, just like fins on the heat sinks. What am I looking at?. So I need more pressure for this setup or any fan would do?. Not many fans are available in our country. Xigmatek, Cooler Master (which I am not interested in at all) and Corsair SP and AF series (which I will be getting). The ideal RPM, IMO (for me/my liking ) is 1500RPM. So, I will be getting the quite editions. So AF or SP?.