There are a lot of paths to go down for streaming audio, but in my mind just two stand out, Sonos and Roon Labs. Sonos is the easy choice, and the easiest to use. Its compatible with the most music services and sources, the broadest variety of control platforms, and has the most hardware options as well. A pair of Sonos One speakers (or the even cheaper Ikea versions) is a tough act to beat.
Where Sonos falls down a little bit is for the audio enthusiast. If you really want to squeeze the very best out of a system, and you enjoy the pursuit, Roon is the system to beat. Its just a better sounding platform, with a really great user interface, if you put the time in to it. Many Roon based systems would be out of the budget of the OP, but I'm Beta testing a product from HiFiBerry that might fit the bill. Here's a little preview.
https://www.hifiberry.com/blog/were-...a-bigger-boat/