Hey all, reporting back after the first of two 2990WX builds. Thanks to everyone on this thread for all of the great information. I ended up settling with:
CPU - 2990WX
MB - Meg Creation
RAM - G.Skill TridentZ F4-3000C16D-32GTZR (64GB in total)
Cooler - Silver Arrow TR4
I'm happy to report that it's all going well so far after 1 day. The RAM is clocking in at 3000, and I'm seeing average temperatures of around 68 degrees under full load. The only quirk I ran into, was that Windows failed to complete an install properly. After a few attempts, I found out online that I had to disable the WiFi while installing. Then once Windows was fully installed, I installed the WiFi drivers, then enabled the device.
The case and power supply for the second build will arrive in the next few days. Then once that is set up I will (hopefully) have two powerful CPU's pumping out many frames for my short film.
On a minor note, I've never been a fan of lighting on computing hardware, and in the past I have actively steered away from such features. But, now when I look at the RAM and MB lighting up with the all of the colours, I must say that it is kind of pretty.
Oh, and I bought one of those $5 Windows 10 licenses off Ebay, and it seems to be totally legitimate, no issues!
[Edit]
I forgot to mention that this build is extremely quiet! Though I did house it in an existing high quality Coolermaster ATCS 840 case I had been keeping for a while. This case has 6 high quality large fans that help the air flow smoothly.