IMHO - the Apple TV box is far and away the best device to have. I have 7 of them in the house, after years of fumbling through crappy Roku, Fire TV devices, sticks, Google TV, etc. I’d pay double if I had to.
They work flawlessly. I never have issues in any apps. Multi-tasking (app switcher) works great. We all have iPhones in the house and quickly use our phones (or Apple Watches) as a TV remote often. I have the ‘Action Button’ on my iPhone setup as the Apple TV remote, and it’s awesome, allowing me to quickly connect to any of the TVs in the house.
Again, just one person’s opinion - Apple TV by a mile and the overall functionality and user experience is elite.
To add - you typically purchase the 32GB 4k devices when they go on sale, often for $80 - $100 (and way less sometimes for refurbished ones).