eardogActually, there is no reason to buy a high-end DAC without a USB to SPDIF processor in this day and age. So a DAC without USB is OK as long as it has coax input. Then go get yourself an Audiophilleo, Off-Ramp or HiFace.
JackulaYulong's DA8 has a proprietary USB interface and DSD capability, but it lists for $1,200. There is a less expensive, stripped down version of the DA8, which I probably shouldn't mention here, that uses the XMOS USB interface that is a common solution for newer DACs.