Perhaps some clarification from those "in the know" because the specs do seem to indicate that the DA8 will play DSD256 and DSD512:
Technical Specifications :
USB Input format support: PCM 16-32bit 44.1Khz 48Khz 88.2Khz 96Khz 176.4Khz 192Khz 352.8Khz 384Khz DSD64,DSD128 - On Windows DSD256,DSD512
Operating system support Mac OSX Linux with UAC2 compliant kernel.
KS/Wasapi/WDM/ASIO Drivers for MS OS XP to Win8 32-64bit
Inputs: Optical, Coaxial, AES/EBU:16-24Bit,44.1-192KHZ
Dynamic Range: >130dB.
Frequency Response: 20-30KHz-0.2dB