I have D3 V2's with a pair of McIntosh MC2301 tube power amplifiers, a GSPre preamplifier, Auralic Vega DAC and Ansuz cables. Interconnects are balanced C, speaker D and one C power cable to the preamp. Digital cable is a Transparent Ultra from my old system.
I built this system using Transparent cables from my old Martin Logan system but the Ultra interconnect and speaker cables did nothing for the Raidho's. These speakers need really good cables if you want to bring out the best in them.
Its a work in progress, I have excellent sound so far but need to upgrade to Ansuz DTC speaker cables and upgrade the DAC, digital cable, add Ansuz power cables to the remaining components and a Ansuz power distribution unit.
Its the never ending story.