The Mogami website spells out all the specs unlike some high end boutique cable manufacturers. Well built w/Neutrik gold connectors and no need to upgrade further.
I am afraid that this is a wrong approach.
Why not upgrade further, who says so,?
Whatever is best for some may be mediocre for others.
Mogami website may publish specs, products are well built, but does this make it a better sounding solution? I know it is not the case, so should the very knowledgeable and respected manufacturer.