This is only the top part of the case I remixed. I added an ir sensor mount to allow for navigation within rasplex with an ir remote.
How to install rasplex
How to setup the IR sensor(hardware portion only)
setting up GPIO IR receiver
At the time of writing (3/17/17) the raspberry pi zero w was very new. I had to move over some files to get the rasplex to boot up on the zero w. The image will be updated in the future to accommodate the new zero w. This is required if all you see is the rainbow square screen.
in my opinion the raspberry pi works way better than the chromecast or amazon fire stick