DobyBlue posted this:
PCM-1791: 113dB SNR: Yamaha V1800 & 3800, Denon 3808, 4308, 5805, DVD-2930
PCM-1796: 123dB SNR: Onkyo 805/875/905, Denon 5308, DVD-3930CI, DVD-3910
PCM-1792: 132dB SNR: Yamaha RX-Z9 and RX-Z11, Denon 5805ci and DVD-5910
The PCM-1796 & 1792 are supposed to be capable of Straight DSD -> Analog conversion, whereas the PCM-1791 requires one more step: DSD -> PCM -> Analog conversion.