Does JDW end up recommending a Noctua fan? (I watched the video previously but don’t recall). Nanoxia also makes a great 60mm fan under its Deep Silence brand which is excellent, and to my recollection comes in a version that is both quieter and moves more air (CFM) than the comparable Noctua fan — worth a look perhaps. I have several of these and they are terrific. I don’t recall the precise Noctua stats however, and JDW certainly does his research!
The 60 mm model of the Deep Silence has 12 volts and rotates at 2,000 revolutions per minute. The Deep Silence 60 mm generates an air flow of 15.8 CFM at a noise level of 12.1 dBA. Using the 7-volt cable reduces the speed to approx. 1200 rpm, which generates and air flow of 9.7 CFM at 6.2 dBA.