Some more HDCD Decoders, these are all DAC's.
Assemblage DAC 1.5
Enlightened Audio Design (EAD) DSP-1000 Series III, DSP-7000 Series III
Manley Designers Reference Series DAC
Musical Design DAC-1
Musical Fidelity X-DAC
PS Audio SL Three
Theta Chroma 396
Sonic Frontiers SFD-1 MKII