Silver vs. Cooper speakers cables


I want to know if silver cables are really better than cooper.
Up to the moment I use Audioquest Volcano biwire cooper cables but many people recomend move to silver for my Tannoy Speakers.
Pure silver or hibrid cooper silver ?
AQ silver cables are very expensive, but I can saw that there are many silver cables at very affordable price like Silver Audio or Analysis Plus.
Please let your opinions and recomendations.
Thanks.
elduende14
Has anyone used Gold cables? If so what do you think about their sonic characteristics (if any) compared to copper/silver?

I'm burning in a pair of Pear IC's presently, and getting some nice results considering <100 hrs of play time. http://www.pearcable.com
There's some interesting information on the properties of Gold versus copper/silver on the above website.
Gold made everything sound golden with glow.
Lack of attack and resolution but added mellow made it soothing and sleepy.
Sm23Chump
Still the best interconnect on the planet. How are those Bose 901's working out for you?