Silver Plated Copper Balanced Cables

I totally agree with Rello. I would also add that Alpha Core TQ-2 interconnects are excellent at $189.00 per 1 meter pair (pure silver.)
I have to be honest though, I have never liked silver plated copper. It has a sound that I don't get into. (Don't confuse this with companies like Kimber who use a silver conductor wire and maybe a copper ground.)
The Cheetah is some of the most neutral wire I have ever used (and I've used a bunch.)If you want a tone control or are trying to match a certain sound, look elsewhere. The Cheetah passes the signal along in whatever form for better or worse.
If you want silver over copper, I'd go for a solid copper cable first.

I did use the AZ Silver Reference. It's a good cable and better than the AZ copper cable which I didn't care for. I don't think it is as transparent as the AQ cable and did seem to add a touch of silvery glow to things the AQ didn't have. With the wrong electronics, it could add a touch of sibilance to things (especially digital playback.)
Honestly, I've found sibilance to be more of an issue with the electronics than the cable itself. For example, I had Kimber KCAG with a Bryston B-60 integrated amp and it had sibilance. I blamed it on the cable but as it turned out, the Bryston's sibilance was just being enhanced by the Kimber. It was really there the whole time.