How about a G65, HD621 and an Oppo?

Though I'd not purchase a new HD621 as the HD722 will be out soon, but a used HD621 would be fine unless you really do need 4K HDMI switching.

Alternatively depending on budget consider a 861v4, 861v6, 861v8. If they have an ID40/ID41 Sooloos card fitted (for streaming) even better.

If you wish to consider audio streaming, there is Meridian Sooloos but I'd recommend that you take look at Roon (lots of information over on the Roon Knowledge Base)

Regards,
Carl

861v6+ID40, HD621, 8000.2, 7200HC, 7200.2, SKYQ Silver, PS3, PDP-LX6090, QNAP TS870-Pro (8*6TB), Roon, iPadAir2.
[In Reserve] C15, MD600 (2*3TB), TwinStore RM (2*2TB)