I can only detect audible diffs between my AES, BNC, and USB cables (BDP-2 > BDA-3) when it's a so-so recording. With the best recs, none that I can hear in my Bryston system. Even with a "hi-end" cable like Cardas, and a cheapie like Canare LV61 BNC (an excellent coaxial, btw). Which is good news. Saves me tons of cash to spend on other stuff.