Add Schiit Loki ($149, a DSD-64 only DAC, that has a RCA analog feed/bypass feature so it functions as an add-on DAC). The tech folks say DSD only should be simpler (cheaper) to implement.
Or iFi Nano iDSD ($189, PCM, DSD, and DXD compatible with headphone output and volume control) with USB cable. No oversampling or converting, waiting for definitive reviews, but hard to believe this much tech can come in such a small package/price without sacrificing sound quality.
