What is the best streaming device to buy?

The best streaming device depends on your ecosystem and needs. Apple TV 4K is the premium choice with the best performance and HomeKit integration. Roku devices (Streaming Stick 4K, Roku Ultra) offer an excellent interface and work with all services. Amazon Fire TV Stick 4K is great if you use Alexa and Amazon ecosystem products. Nvidia Shield is the best for power users and gaming. For budget options, Chromecast with Google TV and Roku Express are reliable and affordable.