Since it is to expensive to buy a digital music player, it is better to create one by yourself

Final Product spec

Platform: cubietruck   http://cubieboard.org/ + lubuntu destop 14.04 boot from nand + sata hdd

HDD:  2TB 2.5 inch hd 

Power supply: at leat 2A power supply

Output: spdif , i2s (TBD)

Control path: MPD (media player daemon) + Volumio frontend  https://volumio.org/

Picture

Control path: Volumio

 

Platform: cubietruck with spdif output

2TB 2.5inch HD

HD650 + Benchmark DAC2