Anyone remotely serious about their music - and, equally, their willingness to pay for a decent service and support the artists they like - could do a lot worse than checking out Bandcamp.
Pay only for what you want, download FLACs (plus many other formats) and stream everything you've ever bought via their app if you'd rather not download any files. They're also far more artist-friendly than the likes of Spotify; I've got a fair amount of music on Spotify and have never seen a cent from them whereas Bandcamp give you a significant percentage of any sales.
Admittedly, Bandcamp doesn't have the breadth of music on there that some other options do - many artists need to do a better job of uploading their libraries, myself included - but right now it's by far the best option for both listeners and artists out there (though I'd absolutely be interested to hear of others). It's unquestionably a better alternative to any option that either gives zero support to the artist, provides a poor service to listeners, or both.