My only question is... why Intel? Unless you've been living under a rock, AMD these days have been absolutely killing it (and Intel's offerings) with the Ryzen 3000 and Threadripper 3000 series of CPUs. Honestly if I was building a brand new high-end PC right now today, I'd actually buy and use an AMD CPU over an Intel CPU for the first time in like 15 years since the Athlon 64 days. For less than the price of that 8 core/16 thread Intel 9900KS CPU, I'd get the AMD Ryzen 9 3900X that has 12 cores/24 threads or even go all gangbusters and get the AMD Ryzen 9 3950X with 16 cores/32 threads (which is DOUBLE what Intel's 9900KS CPU has). The only difference with the Intel is the slightly higher clock speed, but honestly you likely won't notice any difference at all in real world use or even gaming and if you do any tasks like video encoding, Blender, etc. that utilizes multiple cores/threads, the AMD CPU will absolutely murder that Intel chip (even murder the $1,000 high end Intel chips). I'd HIGHLY recommend going AMD Ryzen 3000 or Threadripper 3000 series instead (and if you go for the cheaper but better AMD Ryzen 3000 CPU, reinvest that money saved in higher speed RAM like 3600 or higher because those AMD CPUs perform even better with faster RAM due to the infinity fabric!).
If it wasn't just for the better performance of the AMD CPUs, there's also security to consider here. CPU vulnerabilities keep creeping up for Intel's CPUs, and each one of them causes a performance hit every time they patch a new one. AMD's CPUs are only vulnerable to a couple of them (not Meltdown, etc.), but they're already patched. In addition, AMD's Ryzen 3000 and Threadripper 3000 series of CPUs support PCI Express 4 (aka PCI-E Gen 4) and Intel does not, so in a way you can 'future proof' in that regard. You can have faster NVMe SSDs and whatnot even though that may seem irrelevant right now, give it a year or two when more PCI-E Gen 4 devices are released, then it'll become VERY important. There are some PCI-E Gen 4 NVMe SSDs available right now, with read/write speeds that are mind boggling versus PCI-E Gen 3 NVMe SSDs.
There's honestly no reason I can recommend Intel CPUs right now today, especially expensive ones like that 9900KS when AMD's Ryzen 3000 and Threadripper 3000 series CPUs are just plain better. Better prices, more cores/threads, less vulnerabilities, better performance, etc. Honestly, if couple years ago somebody said that to me (that AMD's CPUs were better than Intel's CPUs), I'd think they were nuts but life's funny like that and AMD is finally on the top again (good for competition, bad when Intel has nothing to answer Ryzen 3000 with and likely won't for another year or two).