@reubent ,
The Auris BluME certainly looks the business. I had been looking at the similarly priced iFi ZEN Blue.
It's good to know there's some purpose built products put there.
Great advice to about the Raspberry Pi streamer option too, especially with the phrase "the sound quality is significantly better than the bluetooth option" attached.
My lazy instincts would be to go the Bluetooth route, esp version 5,
but I'm not going to rule the Raspberry Pi option out just yet.
Thanks.