Actually the Nexxos V2 ST30 has a 15FPI value.@SSJ4 I've got the following rads and will be posting tests.
XSPC Tx240 (20mm thick, 22 fpi)
Alphacool Lt240 (25mm thick, 16 fpi)
Hwlabs L series 240 (bitspower leviathan, 30mm thick 16 fpi)
Debating purchasing the alphacool nexxos 240 v.2, which is 30mm thick but only 12 FPI. That's the rad @optimumtech used.
About the fan, at the moment there is a valid and on par alternative to the Noctua slim! are the Scythe KazeFlex Slim 1800RPM (KF1215FD18-P)
The same you find on the Big Shuriken 3.
I use to have it on top the BlackRidge. I like the better noise sound of them till 70% of the speed. After, it gets a bit louder than the Noctua slim.
But is half of the price!
Here the SFF.Network review
Scythe KazeFlex low-profile fan review. – SFF.Network
smallformfactor.net