Which SILVER cables sound best?

If money is no object, try Acoustic Zen silver ICs. For real world I like Silver Audio Hyacinth $275 or HT ProSilway 11 $399 new. Both are superior to Kimber Silver Streak or KCAG, which sound hard and bleached in comparison. Kimber has much more expensive reference line which are probably much better sounding. I have not heard the much cheaper homegrown audio ICs

Acoustic Zen

Silversmith

Who has compared Stealth to Hyacinth & to Pure Silver Sound?

I have not compared them, but from the pictures PSS looks like the same design as Silver Audio Silver Bullet 4 with cheaper RCA connectors. You should contact Cable Co. and arrange to hear some ICs in your system, comments here are too general to be of much use for how it would sound in your individual system.