I think using Media Server will help me, but I'm not certain I understand the Wiki article. I would use Media Server only at home, no streaming my local files over the internet to my phone or my work computer.
My home hardware consists of my Silver computer hard-wired to our router and my home theater system. My Black computer roams in the house and is connected to our router via wifi and is then connected via USB to a couple of head phone systems. Finally, my media files are located on a NAS, hard wired to our router.
I use my Silver computer as my "main" computer. But I'd like my Black computer to have access to the Library on my Silver computer, and be able to sync to that Library (so all my Date Last Played, etc. meta-data stays current).
So, first, do I need a copy of my Library on my NAS, or by setting up Media Server, do other computers on our network have access to the Library on my Silver computer?