I would say it depends on your usage and how invested you are in the different Eco systems.
Here is my thing. I have three ATV3s, 2 iPhone 5s, an iPad mini, an iPad 3, and a Mac Mini (late 2012 fully loaded model). I have about 20 movies purchased through iTunes, almost all of my music is purchased through iTunes, apps, etc...
I heavily use my iPhones and iPads to AirPlay a lot of video, especially new downloaded content that hasn't been added to iTunes yet. I have TONS of movies and TV shows as well that the seamless integration between my iOS devices, ATV, and Mac make it so easy to watch content on my TV.
Now I have a cheap android tablet that I bought to just mess around with and try out android but not very impressed. It has a few nice options like using MicroSD cards and USB drives. Toggles are nice as well but I can get all tht functionality with my iPad mini that I am using to type this out with a Jailbreak. IFile and NCSettings gives me those options. Problem solved. While the android tablet does play video, Internet, email, etc... It does not integrate into the rest of my setup making it pretty much useless for my needs.
Overall, get what you think is best for you though. I wish u luck with whatever you purchase.