Aurender W20 is the best digital source I have heard so far. It sounded great in pair with Vitus RD-100 DAC. But W20 achieves the best results with MSB and dCS DACs because you can use a single clock (internal in case of MSB and external in case of dCS) for W20 and a connected DAC.
If you are looking for the best streamer you should try Linn Klimax. I heard Klimax DS and Lumin A1 face to face. The latter sounded thin and uninvolving in comparison with DS. And I doubt A1 can compete even with Linn Akurate DS. Linn streamers sound warm and extremely transparent, especially versions with internal preamps (DSM).
If you are looking for the best streamer you should try Linn Klimax. I heard Klimax DS and Lumin A1 face to face. The latter sounded thin and uninvolving in comparison with DS. And I doubt A1 can compete even with Linn Akurate DS. Linn streamers sound warm and extremely transparent, especially versions with internal preamps (DSM).