Another interesting choice to playback the DSD and PCM music files you may have (or may have in the future) is Oppo's new HA-1 Headphone Amp. While it's being marketed as a headphone amp, the unit also has a USB input and a Digital to Audio Converter (DAC) that plays DSD music downloads up to Quad DSD (DSD256) resolution as well as PCM music files and downloads.
A pretty interesting product, especially at its low price of $1,199. Unfortunately, like the Sony HAP-Z1ES supplies of this one are pretty tight - it's currently Sold Out at Oppo with more due in at the end of May,
Oppo HA-1 Stereo Headphone Amp and DSD/PCM DAC
http://www.oppodigital.com/headphone-amplifier-ha-1/
A pretty interesting product, especially at its low price of $1,199. Unfortunately, like the Sony HAP-Z1ES supplies of this one are pretty tight - it's currently Sold Out at Oppo with more due in at the end of May,
Oppo HA-1 Stereo Headphone Amp and DSD/PCM DAC
http://www.oppodigital.com/headphone-amplifier-ha-1/