Question for the video nerds--------------

I am updating my video system and need a streaming device. My vendor recommends either an apple-tv or a roku device. We stream Netflix and Amazon prime only. I appreciate any experienced feedback you folks could give me.
Rat-------------
We use a Chrome cast got it at Target $39
It casts anything you can bring up on your phone or computer on to your TV, we have a 60 inch Samsung.
Requires that you have fast internet and a wireless router to setup a WiFi network.
Simple, works great, no separate remote, already got a draw full of remotes.
Good luck it's easy.