WBT Spades Ag vs Cu???

I am looking to re-terminate some Kimber Selects 3035 from bananas to spades. I need to decide whether it is worth the extra $160 to get the silver spades versus the copper. The Kimber 3035 cables are a blend of copper and silver.

Any advice or comments would be appreciated.
Yes,it worth extra $160 over copper,especially if you switch from WBT angle bananas to spades.From my experience,any WBT bananas degrade sound.You'll feel difference immediately after replace.Full Burn-in time for WBT silver spades:80-120 hours.