I am not really all that keen on themed home theaters. It is highly unlikely that anyone ever intends to watch only movies that go with a certain media room decor. At the very best, you will eventually become blind to all the niceties you spend lots of money on, so only visitors can truly appreciate your efforts. But maybe that's worth it to you?
Anyway, I am rather partial to steampunk design principles. However, my interpretation of steampunk is a bit demanding. I want to see brand new objects, designed according to the aesthetics of the age of steam. They must be well-made and fully functional. If you share these lofty ideas, here is an item that would be a great addition to a suitable media room. This phonograph is a replica of and old Gramophone, but apart from a turntable it features a CD player and AM/FM radio. The replica is produced by Technosonic.
If you don't need modern audio capabilities, this replica RCA (sold on Amazon) is perhaps even more stylish. It comes complete with the famous "His Master's Voice" logo. The design is from the early 1900s (1902-1916, to be more precise). Of course, it would be silly to use this little gem on a regular basis to play 78 rpm records. But it suffices to know that it would work, should you ever have to use it!