They are wonderful, G. Extremely good bang for the buck as well. They replaced three complete sets of ICs that I owned from 3 different mfgs, that retailed (per 1M pair) for $500, $900, and $1,300 respectively. If you like the Anti-cables, you will probably like the Anti-ICs. Are there better? Of course, but how much are you willing to spend to get that little extra?
Note: I do think the Anti-ICs are a little more system dependent than the Anti-Cables though, from listening to other systems with them. Both work very well in my system, though.
No silver on either that I'm aware of. Just solid copper magnet wire.