LionD :
How could the Dark Rock Pro be quitest cooler with its insane 2100 rpm? Something is wrong here.
Another aspect that's hard to factor is the difference between rated specs and real world. The dark rock pro 3 can get fairly audible if the fans are spinning full speed but it took a lot of doing to push them there in real world use. My 4690k is oc'd to 4.6ghz and I had to run prime95 v26.6 small fft's as well as turn off every single case fan in order to force it to ramp the fans up. It's not very realistic to run p95 on an oc'd processor with no active case ventilation.
Under normal circumstances with the stock 200mm intake fan (which isn't the best for airflow performance) and stock 140mm exhaust on the enthoo pro running at around 7v and two noctua 140mm fans running at around 5-7v, the dark rock pro 3 never becomes audible either while gaming or running p95 with a decent overclock.
The specs for the dark rock pro 3 fans may be off in this article. As far as I know the fans included with the cooler aren't the same as those sold retail. The cooler specs from bequiet say they're silent wings fans, not silent wings 2 or 3 which are what they sell retail. They also don't offer retail 135mm fans which the drp3 uses, they only offer 120 or 140mm fans. The drp3 cooler specs say the fan speeds are 1400rpm for the 135mm and 1700rpm for the 120mm at 100% pwm speed. Not 2k rpm +. They do have a silent wings 3 high speed 120mm pwm fan that runs 2200rpm at 28.6dba but it's not the one included with the cooler.
The same may go for the other coolers, if they're able to cool the cpu in the conditions in which it's used without reaching 100% fan speed then the loudest fan rating may not apply in real world use. Just because it says a cooler 'can be' xyz dba doesn't mean it will be. A max noise rating of 30dba doesn't matter much if under normal conditions it only runs at 25-50% fan speed and stays under 20dba.
For the price the fuma seems to do pretty well. It depends on what it's being compared to, other coolers of the same height or smaller for size constraints? Ram interference? Performance at that price level? There are similarly priced coolers like the reeven justice or thermalright true spirit 140 power that will potentially outperform it at $40-50 but if height is an issue the fuma would be the better choice as it's shorter than either of those. If ram clearance at that price point is an issue but cooler height isn't, the true spirit 140 power or cryorig h5 universal might be better options.