I'm using Golden Ref speaker cables and in my opinion they sound just fine. There are too many variables in the system to say what causes differing sounds, harshness, mouth, head sounds, fat bass etc. It could be caused by so many parts of the entire sound reproduction chain but in my quest for a balanced sound, the Golden Ref have never been found to be at fault to date. If there is a family resemblance of sound, it is not with the other members of the Cardas line but of copper wires in general. Copper has a particular sweetness that mixed or silver cables cannot match. But they can sound dull and be lacking in ultimate resolution. This is what the physical construction of the GR was designed to avoid and I think they have managed it pretty well. So my experience with them is very satisfactory and I have yet to find a more neutral speaker cable.
So to answer your question, try them all in your system and see how they sound. GR is highly neutral and extended so if it turns out sounding otherwise, something else in your system is causing it. But two unbalanced components can be match to sound neutral so ultimately it's still your choice.
I also have tried the Speltz speaker and ic cables (balanced configuration). Burnt them in for a LONG time as per instructions (500 hours) and they still sound like their prices, ordinary - neither extended nor neutral. I gave the speaker cables away and have the ics lying around somewhere because they look cool.
So to answer your question, try them all in your system and see how they sound. GR is highly neutral and extended so if it turns out sounding otherwise, something else in your system is causing it. But two unbalanced components can be match to sound neutral so ultimately it's still your choice.
I also have tried the Speltz speaker and ic cables (balanced configuration). Burnt them in for a LONG time as per instructions (500 hours) and they still sound like their prices, ordinary - neither extended nor neutral. I gave the speaker cables away and have the ics lying around somewhere because they look cool.