Whoever tells you the Acoustic Zen and the Harmonic Tech sounds the same, should get there ears cleaned out.The two cables are quite different.I have compared a New Silver(when I say new I mean the one shipping from AZ the last few weeks, Robert lee has been changing the Silver drastically), to the Nordost Valhalla.The Zen steeped all over the nordost.The Harmonic is not even in the same league.The topology of the cable is completely different.AS for the Satori Ejlif is 100% accurate in his statements.As for the connector type, theoretically the XLR would be the best choice, however if you asks around the audio industry , everyone will tell you Rca is the better sounding connector.