In my Antec p182 I put two fans extracting air (top and back) and one in the front introducing air, which introduces air must have good pressure. Fans of this box are 12cm.
The fans need to be efficient and quite silent.
The fans extracting and introduced air can be different.
What do you consider better between these fans?
Be Quiet Silent Wings 2 1500rpm
Scythe Gentle Typhoon 1450rpm 120x120mm
Noctua NF-P12 120x120 1300 RPM Ultra-Low-Noise
Accept any other suggestions.
If you want real quiet go with Scythe Gentle Typhoon 800rpm soft mounted.