I still need to update this topic,
so not all the newer X399 boards vrm details are added yet.
But like i mentioned, pretty much all boards are decent for your needs.
I would personally just skip on the Asrock X399 phantom,
because that board has too much limitations wen it comes to pci-e layout.
And the vrm is also gimped.
For the rest just compair which board has the features you like for the best price.