Here is a mini desktop with a modular design that lets you set up and customize your home entertainment system without opening the chassis. The Acer Revo Build is compact enough to fit in a bookshelf. You get different block options to enhance its capabilities. For instance, you can add a portable hard drive block when you need more storage. The magnet pin in the blocks allows them to easily connect to each other without cables. You get wireless power, hard drive, and audio blocks to choose from.
This particular model runs Windows 10. It has 2 GB of RAM, 32 GB of storage space, Intel HD graphics, Bluetooth, 802.11ac WiFi, 3 x USB 3.0 ports, 1 x HDMI, and 1 Display Port. Not too expensive either.