I owned the Colorado as well, but in my system it sounded more on the warm side. But the Cardas Golden ref is more warm sounding compared to the Colorado. But there is one thing you will loose. You will have less resolution and less decay with this cable. But it will give you the warmth in the mid freq.
Audioquest colorado sound to bright
I huse AQ colorado on my systeme and i want replace it because its to bright. considering this carateristic, i would like to know if the cardas golden reference would be a good upgrade? or maybe the golden cross would be better?