To add my tuppence worth, The Cardas and Audience are in reality highly detailed in my experience with very extended and natural frequency extremes. Neither is in any way rolled off.

I have  found some cables to offer what at first hearing appears to be a more detailed presentation but on extended listening, this is acheived by curtailing the upper frequencies, in effect acting as a low pass filter. This seems to have the effect of focusing on the midrange and accentuating the detail. this would work very well in some systems but not in others.

Likewise the Cardas, due to the body it imparts, can sound dull in certain setups. The lesson is that cables are incredibly system dependent and therefore opinions on their performance are as good as useless. Audition in your system is the only solution.

In the end, Titian is spot on when he mentions room treatment. this will have a far more pronounced effect on your end result than some cables IMO. But if you are set on buying cables, do try Transparent, Dynaudio Ocos speaker cable, and some Coherence products. With the latter at least you  aren't paying for the marketing budget.