I just bought my first Noctua product, S12A. My first reaction: why isn't Noctua more popular on SPCR??
I concur with you completely. Noctua fans are far more quiet and produce less vibration and even studier than others. Apart from them, they exhibit really nice and stable PWM characteristics. I have been brooding upon the reason from time to time and my conclusion is as follows: (i) Noctua fans are more expensive than others, which perhaps diminishes the performance to cost ratio. (ii) Noctua is not included as one of official sponsors of SPCR, hence their products are less reveiwed than other fans. (iii) Lastly, Noctua fans are truly quiet around relatively low rpms, e.g, 300-700 rpms, in which general readers are less interested than normal range, 700-1500 rpms. Only noise-obssessed people highly value silent operations at low rpms.
It is not that we are noise-obsessed but that other people tolerate high noise, often because they think they have no choice except to endure unwanted sounds.
I have the Noctua NH-C14 CPU cooler after reading reviews about the cooler as well as the fan on this site, with some confirmation on other sites.
Btw, my current account is recent but I was member around the time when the P180 V1 was introduced and my current PC is the P180 with everything else replaced this summer.