There has already testing been done with a few air coolers, look back on the thread and you'll find it.
The 8700k runs hot and I wouldn't go any further than setting the turbo to an all core 4.7ghz with the NH-L12, hard to say really without knowing what programs you run and what loads they place on the CPU. For gaming this should be fine.
With Coffee lake 6 cores the temps go nuts when you run anything with AVX instructions, this is when you want to run an -2, -3 AVX offset if you use software that runs AVX instructions.
You'd probably have a little more headroom with an 8600k if you don't need the hyperthreads.
If you are looking for a 5ghz+ overclock with an 8700k it's going to have to be an AIO, or custom water using it in the Ghost S1.
If productivity was my main use for this, with gaming as a secondary concern. I'd more than likely be looking at Zen+ for the timeframe that the case will be delivered in.
With the 65w replacement for the Ryzen 7 1700, you'd take away all the hassle of cooling it and you could just choose the quietest cooling solution available.
More information on their latest testing will be available soon. (see end of post for link to already completed cpu air cooler tests)
Yes, absolutely.
The big downside to this cooler is it will not work in AM4, Sycthe will not make or release a mounting kit to support it.
This cooler was also designed in the DDR3 era and has a Ram height limit of 39mm which you need to pay attention to when you buy DDR4. That takes Gskill Ripjaws V straight off the table at 41mm high, this particular ram has the most potential for overclockers on Coffee Lake, Cas17 4133+ is easily achievable with it's Samsung B-die IC's which all the kits are guaranteed (currently) to have at 3600+ kit rated speeds.
Other than that I agree, the Shuriken 2 Rev B with a NF-A12x15 is a potent combination.
I just think the NH-L12 has a bit more thermal capacity for Coffee lake, I guess we'll see if the Louqe team actually test with Coffee Lake rather than the i7 7700k.
While they are thermally similar, Coffee lake can really heat up with no delid in place and all of these HTPC coolers were never designed for such use.
Here is a link to the CPU Cooler tests that have already been done! (I have requested PaChalski adds this link onto his opening post)
http://louqe.com/img/heatsinktest.pdf
Thanks for helping out answering all these questions and clarifying things @Legion!
The link to the AIR cooler test report has been added to the OP. It is the latest one we did a couple of days ago with a different method. The exact same same method and rig (L12 setup) was used during the live stream (in the end of it) with a FireStrike Extreem score over 8100p and zero noise.
http://louqe.com/img/img/ext/ext/GhostCPUheatSinkTest.pdf