Agisthos, I borrowed a High Fidelity CT-1 digital cable from the Cable Company based on all the positive buzz here on Audiogon. I thought the Black Cat Silverstar sounded just as good as the High Fidelity CT-1 at 20% the price. In my system, the Klee Digital Waveguide was a step up from the Black Cat and CT-1, although it retails for $1350, so it should sound better. I also preferred the PAD Acqueous Aureus at $750 to the HFC CT-1.
I am not bashing High Fidelity Cables. Some Audiogon members whose opinions I trust have nothing but praise for the HFC interconnects, speaker cables, and power cords. My point is that cables are fairly system dependent, so make sure to try it before you buy it.