I've been gradually upgrading my peripherals and desk. I feel happy enough to post an update on my build.
After v1.5 I purchased the following items:
Purchasing a proper desk allowed me to focus on cable management. After watching way too many YouTube videos on desk setups I learned a thing or two. For example, in order to hide the keyboard and mouse cables I drilled two holes in one of the table tops and used a hole grommet to cover the edges.
To keep the cables off the floor I went to IKEA and got a Signum rack which greatly simplified the cable management.
Adding the second monitor gave the build extra symmetry and much needed screen real-estate. Additionally, mounting them to a stand freed the desk and looks a lot cleaner.
Overall I'm very happy with the way the build is coming along and would definitely appreciate any comments/suggestions for future upgrades.