My old 2nd generation FireTV's have been starting to fail. Amazon is more restrictive on the newer devices so I've been in the market for an alternative. I picked up the Onn 4k Plus, Onn 4k Pro and the Onn media stick. The stick is a little slow for my taste but both the Plus and Pro are solid players. The remote is great as well. Replacing the launcher with Projectivity gets rid of all ads and is a great way to set it up. Here are a number of links about the devices:
Onn 4K Plus Just Got Better – Unlock Storage & Speed Tricks!
Firestick Can’t Do THIS! Onn 4K Pro Home Screen Hack (No Ads!)
Unleash Onn 4K Plus or Onn 4K Pro Android TV Box - Secret Tips & Tricks Revealed!