The ability to download Prime video for later viewing sold me. I have side-loaded a lot of movies on my Fire for just that reason. But when I tried to watch one on a plane, the video wasn't load enough. I will be interested to see if this one has a louder setting. Or maybe I will mayday that issue in the airport.
I can always give my older devices to my family. My husband is currently using my 7" kindle HD. I am using the 8.9", because I was in a graphic novel phase for while last year. But I am reading more and more magazines on the KF, and this will just make it better.
By now, I am as stuck in the Amazon ecosystem as my daughter is in the Apple ecosystem. There are some spirited conversations at our dinner table!