I have an excellent sounding MHDT Orchid which was modified, thus: 8 key resistors replaced and upgraded directly around the tube with a mix of Vishay Zfoils, Audio Note Tantalum non-magnetic and Shinkoh. Also replaced: output caps, changed to VH Audio Audio Vcap Odam 2.2uf. Total cost of DAC and then later mods: $1610
I have A/B'd it against the Denafrips you mention, and it sounds better. It competed decently with the Holo Audio May DAC, but the Holo was better. It is nearly $6k, however.