One last go at the W4S new line up:
DAC-2 $1500, same old same old
DAC-2 DSD $1600, new usb module, dsd enabled sabre
DAC-2 DSDse $2500, new usb module, dsd enabled sabre, boutique parts
Keeping in mind that the base models already had top shelf parts, the parts upgrade is truly boutique and not swapping out crap for good.