I have the top end power supply and cable from Sonore for the OpticalRendu. Not worth it compared to the standard power supply they sell. My system is uber revealing, especially with my RAAL SR1a phones and I could not tell a difference. I had 3 opticalRendus to compare with.
BTW - I see a few OpticalRendu's up for sale. I just re-bought just the oR ROON ONLY version for $700. Great time to pick up a used oR.