I received the USB cable and rigged it today. I must confess that i was pleasantly surprised with the sonic improvement. I can't talk all that audiophile lango, but i assuredly heard recordings in a different way.. the nuances of drums rolls, horn flutters, gasps of breath even. Pretty remarkable. My conclusion is that purchasing a $350 digital cable for a $5,000 headphone amplifier is justifiable. Makes me wonder if spending the extra $300 for the next level cable would have been worth it? And here i go down the rabbit hole :) If you are curious, I'm pairing Foster MK II (closed) headphones with a MHA 100 Headphone amp and a MVP 901 DVD. I have a pair of Soliloquy book shelves running to the 50W headphone amp but they get little usage. Happy to be streaming-along better now. Thanks for all the tips.