Some good options listed above. I'll just chime in because I've got the Stereovox XV2, which is related to the Illuminati and Blackcat as it's from the same designer. It's a very transparent and very detailed digital cable, so if you're looking for more clarity and detail out of your system these may be good cables to try. If your system already leans to the, um, lean side they may not work for you, although the Blackcat my be different -- I haven't heard it.
I also have an Apogee Wyde Eye that I tend to use most of the time. In my system it sounds a little more balanced and natural and less tipped up in the highs than the Stereovox yet still nicely detailed. You can get a 0.5m Wyde Eye cheap at music stores (i.e. Guitar Center, etc.). Hope this helps and best of luck.
I also have an Apogee Wyde Eye that I tend to use most of the time. In my system it sounds a little more balanced and natural and less tipped up in the highs than the Stereovox yet still nicely detailed. You can get a 0.5m Wyde Eye cheap at music stores (i.e. Guitar Center, etc.). Hope this helps and best of luck.