That's true -- I don't know why, but the CXU only allows me to send DSD via HDMI, and not by Digital Coax. If I could take the DSD stream from the HDMI output of the CXU, and convert it to coax, I suppose I could feed that into the Benchmark and see how it sounds (not sure if that's possible; does anyone know?). It's not a big deal, though, because the CXU's DAC does a nice job on my SACD's, so I can just send the analog output from the CXU to my preamp.