This was aimed at you, obviously.
Someone by the name of Michael PM'd me about finding a DAC III B SPX for sale here, to arrive tomorrow or Tuesday. This website is messed up. I can log on as my user name, I can receive PM's but can not view conversations or respond, instead getting a message that my account has been canceled. I suspect it is my buy/sell account that has been canceled and if so, I don't care.
So this is to you Michael. Congrats. For whatever reason, Slawa seems to ship his DAC's with whatever EL84 he has on hand. My DAC III B was shipped with some rather unidentifiable Russian EL84 or its equivalent the 6P14P. Sovtek perhaps? I tried but did not find a matching etching searching on the web. All I know is I replaced them with Tungsrams which are not cheap at $120/tube the last time Kevin Deal stocked any (he seems be out of all Tungsrams). They changed the sound immensely. For the better.
Next comes the cable. With my Aurender W20 an Analysis Plus Silver Apex S/PDIF sounded far superior than any other cable I tried. This had to be custom ordered from AP.