I am certainly not the expert in closed cans, but a couple questions that may help get you closer... 1) Are they primarily for home or portable use? 2) Are you planning on using an amp? If so, which one? 3) Have you considered Beats By Dre Studios? JK on question 3
I don't think your question ever got answered, but if I missed it, my bad! Yes you can run 3 amps simultaniously off the Gungir ( XLR, 2 RCA). I have mine hoked up to Mujlnir, and i2 other amps. I run multiple at the same time quite often.