I am using my ST-500 with Pure Note (TRS audio) Alluvion XLRs. These proved to be an excellent match between my w4s DAC2 and ST-500. Look for low capacitance XLRs with mostly air-spaced conductors. The Alluvions are cryo treated silver-palladium ribbons. Also later you can change the fuses on the ICE modules of the amp. I also changed my powercord on the DAC2 with a Neotech NEP-3003 cord (OCC copper based and cryo'd) with Furutech ends. This opened up the soundstage alot without being harsh at all. Had almost the same impact sonically to when I installed my pure notes.
Cheers!
Cheers!