The Amazon Fire TV second generation streaming television box came out near the end of 2015 and it is the first model that gives you glorious 4K resolution. One of the most compelling aspects of this device is that it has Alexa built right into the remote, which will allow you to search for movies, music and the actors and artists.
One of the things the Fire TV 2015 edition has going for it is that it has an SD card and USB connector. This will allow you to import your own apps, photographs, movies and music. The first generation model did not have this kind of support, and you had to employ crazy workarounds to import in your own content.