Your receiver has an optical input, so all you need to do is get a $35 Chromecast Audio plus a mini optical cable to connect the Chromecast to your receiver. See here for more information: http://archimago.blogspot.nl/2016/02/measurements-google-chromecast-audio_27.html
A Sonos Connect would be a more expensive alternative.
All this really is a no brainer, because utterly convenient, and the DAC (digital to analogue converter) in the receiver will be responsible for sound quality. You can always invest heavily in a better external DAC later if you really want to, but I doubt you will need to.
The most important decision will be to choose the right streaming service for your favourite repertoire, for the interface, and for sound quality. Spotify is not quite full Red Book CD (but close at 320 kbps). Tidal and Qobuz here in Europe are full Redbook CD quality.
A Sonos Connect would be a more expensive alternative.
All this really is a no brainer, because utterly convenient, and the DAC (digital to analogue converter) in the receiver will be responsible for sound quality. You can always invest heavily in a better external DAC later if you really want to, but I doubt you will need to.
The most important decision will be to choose the right streaming service for your favourite repertoire, for the interface, and for sound quality. Spotify is not quite full Red Book CD (but close at 320 kbps). Tidal and Qobuz here in Europe are full Redbook CD quality.