Best component cables silver or copper

I can't answer your question. But check out Synergistic Research Designers Reference component cable. Outstanding.

For a real surprise check into the JPS Labs cables - actually aluminum/copper alloy. I have their audio cables and they simply blew away any copper or silver I tried - the clarity of silver and warmth of copper.
I know. I know. When you think of aluminum you think of cheap storm doors and 1970s houses burning down. But do yourself a favor and check out their website, reviews and give the owner a call. I'd imagine their video cables would be as good as their audio cables.
Just my $.02

i have yet to be in a telecine facility that used anything but copper to do film to tape corrections or fixes for the final visual on any dvd.

From speaking with a cable manufacturer (the owner in fact), I learnt that the skin effect is far more pronounced (and beneficial) in video transmission than audio, so silver-plated copper is probably the best combo for video frequencies.

Having said that, Jaybo is right; having done some work years back with television studios, it's copper copper everywhere. Now that was for normal analog transmission, so who knows what TV studios are using for freeview HD digital? Perhaps it's worth finding out, since what the pro's use is a good guide for us.