Alkeron's Class-E 211 enclosure is built for slim and compact HTPCs.
The case can house up to Mini-ITX size motherboards, along with a single 3.5" or 2.5" drive. Built into the case is a 65 W power supply, which should be enough to power the hardware in the case. It is built to be cooled fanlessly, though there is a spot for an optional 40 mm fan in the rear.
Also built into the case is a USB connected Infrared Receiver, meaning that you can use various remote controls to, well, control it.
The case should already be available at select e-tailers and will be arriving to retailers starting in 2014. Its MSRP price is set at $179.