Hello,
For what it's worth, I think that if this workstation is intended to be used for Corona rendering mostly (=no GPU rendering), you should have bought a less powerful graphic card, and a more powerful CPU.
However, going on 128 Gb RAM is a good choice. Maybe another NVMe or two instead of the "classical" 6TB hard drive, especially with it running at 5400 rpm.
Anyway, you'll get a great workstation to play with, enjoy :)