Building Recommended Editing Systems

Why in the world would you specify a SATA 3 M.2 drive like that and waste a good M.2 connector that could be used with a PCIe Gen 3 x4 M.2 device that would be 4x the read/write performance.

If I were building that motherboard/memory/CPU/GPU I would have one standard SATA 3 smaller (probably 256 GB) for the boot drive and then add a second SSD of the M.2 PCIe Gen3 x4 variety like a Samsung 960 EVO for all your project files and then an optional hard disk drive or two to backup and archive old projects.

Looks nice.  Add sufficiently sized Project, Cache, Media and Export disks and you're golden.