If you're a DIY'er, you don't have to wait for a service to stock its library, nor wait for hardware- and device-selling companies to catch up. By taking a software approach, you can build your own surround sound library from your existing media. I've been using a program called "DVD Audio Extractor" to get multi-channel tracks for a couple of years now.
It all started with my quest to extract the hi-rez tracks from the blu-rays within the Immersion Box Sets of "Dark Side of the Moon" and "Wish You Were Here." Since then, I've extracted nearly all of my 5.1 content (including Queen in Montreal, Foo Fighters at Wembley, Eagles, Stone Temple Pilots on DVD-A, and a very long list of distinguished others).
Simply extract the tracks to multi-channel FLAC files, and then use VLC or Kodi (both free) to play them back over an HDMI connection between your comp and AVR.
Here are some how-to details you can use for guidance:
http://www.computeraudiophile.com/content/419-guide-ripping-dvd-and-blu-...
Happy ripping and multi-channel-listening!