which DAC to buy ?

I have heard the first three and I would buy the Hermes. I think it is the most refined and musical DAC I have heard.

Personaly I think either the DCS Delius or Elgar surpass any of those you have listed.

I have an Hermes 24/192 and an Electrocompaniet ECM I use as a DAC. Hard to beat.

I just auditioned the audiomeca in my home last week and bought it. I has a top Dodson. I hear less harsh edges, a more quiet background. I also added a CD transformer. It made soundstage bigger and made instruments seem more destinct with both dacs. I really suggest you listen to one if you've got some extra cash.