Noctua NF-S12A vs Corsair AF 140

I'm planning on a new case, Corsair 300R. I want it to run cool and quiet. So I'm thinking to replace the front fans with the Noctua or Corsair fans. Price is about the same so I'm looking for opinions on which is better for case airflow. Ideally I'd like the system to self regulate itself or stay at one spot which is quiet for movie watching yet cool temps when gaming for an hour.

Currently I have to adjust fan speeds before and after gaming and it's not very quiet when gaming. I have 3 cooler master blade master fans including the cpu fan. And at 70% they are loud. It's excellent cooling but noisy.