Noise profile too, but for those really picky, pay the price for the cooler you like.
Not everyone will like the same fan. And choosing a cooler, as long clearance is fine, and looks is a personal choice, but noise is down to fan.
Tried few Noctua before, didn't like the fans. Tried the new Silent Wings 4 High Speed, didn't like them either.
Using a NH-U12A Chromax now and the new 120mm fans are fantastic, very quiet, but haven't tried them as case fan.
For case fans, as the extra thickness of the T30 doesn't cause any issues for me, is the best fan I have tried so far. I can't recommend highly enough for those who are happy to pay £80 for three fans and no RGB, just performance.
At high rpm there is no miracle: every fan will be noticeable, or annoying. But for me, personal taste, I prefer a muffed sound of the T30s (when over 1000rpm, as 10 x T30s at 800ish rpm can't be heard) rather than the very decent P12s and their 1000-1200 rpm but humming.
When comes down to noise, the 1C or 2C difference in performance becomes irrelevant, as most decent coolers will perform very close, but as those who are picky knows, choosing a cooler (and the fan supplied with it) is like choosing a headphone or a speaker. May sound good or even pleasant for one person, but poor for another person.
Despite the performance of the AIOs, specially the 360mm and 420mm, most AIOs I would simply pass because of the high pitch noise from the pump. Not the loudest part of the AIO, but is the most annoying one.
Speaking of AIOs, every time I tried the Corsair Capellix, the supplied fans are noisy, but can be tamed if capped at 30 to 35% max, but the pump, even on silent is annoying. Not noticeable, annoying. Some people don't notice, some people don't care, but I'm the kind of person who can't drive a car if there's a loose object rattling somewhere.
As choice for coolers, I'm sure there's a lot of good ones cheaper, but mainly you get recommendation for NH-D15/15S or the new NH-U12A because they do perform well, are reasonably quiet and very easy to install. Dark Rock Pro 4 is a beast of a cooler, quieter, but can be a pain to install. I personally only avoid the NH-D15 and the Dark Rock Pro 4 because they seat too close to the PCI-E slot, making it a pain to unlock the GPU and overhang the RAM, causing some clearance issues.
The value is with the AK620, but is louder than both. And not cheap, only cheaper.