I wouldn't worry so much about cable materials as much as how the cables sound within the context of your system and tastes. There are copper cables that sound like silver and vice versa -- it all depends on the implementation.
That said, it sounds like you're looking for the detail and speed of silver but don't want the brightness that comes with some silver designs. I found the VooDoo Ultralinear interconnects to be very good in this regard as they provided a nice combination of tone, speed, and detail without going too far so as to cause excessive brightness or harsh sibilants. I found them to be more tame than the AZ Silver Ref. II in this regard.
The good news is it's pretty easy to try a bunch of interconnects in your system, and given the variability of how interconnects can sound in different systems you should try as many as possible to really find what works best for you. Hope this helps, and best of luck in your search.
That said, it sounds like you're looking for the detail and speed of silver but don't want the brightness that comes with some silver designs. I found the VooDoo Ultralinear interconnects to be very good in this regard as they provided a nice combination of tone, speed, and detail without going too far so as to cause excessive brightness or harsh sibilants. I found them to be more tame than the AZ Silver Ref. II in this regard.
The good news is it's pretty easy to try a bunch of interconnects in your system, and given the variability of how interconnects can sound in different systems you should try as many as possible to really find what works best for you. Hope this helps, and best of luck in your search.