The new TPA3116 2x50w digital amp just arrived, and it's going to be part of a new project.
Here it is, in all its glory, with banana for scale:
To bring it all together, I'm planning to use this enclosure:
The plan is to stuff the amp, power supply, a Raspberry Pi B+ with HifiBerry, a phono preamp and a passive source selector inside the case. There's still a few bits and pieces awaiting arrival from China, so this may take some time. Still, it's a start.