Nice article. About two years ago I wanted to make my pc completely silent as well. It turned out that the cheapest solution for me was to put the pc in another room that I don't sit in and put long hdmi + USB cables through the wall. I also soldered on a longer cable with a power button so I can start the pc from my room. The only downside for me is that I had to run cables along my walls through a conduit but I think in total I paid less than 40€.