Multimedia PC accesories
Since this is a multimedia PC, a great accessory to get would be a remote control, that way you can control your music or movie without having to be tied down next to your PC. A highly recommended remote control is the Logitech Harmony 688 (B0003QER8C). It features a LCD display to show you what you are controlling. Best of all you can set up the remote control by plugging it in to your PC and download macros to control entire home theater system as well as your PC.