New hook-up wite for amps & pre-amps.

I tring to find out the best hook-up wire to modiy my tube pre-amp! Its using VDH silver now! I was wondering if anyone has wisdom on this?
Why not try a 100% copper without silver plating for a mellower sound and to find out if it's something you like.

Thanks for your perspective I am considering CARDAS wire which is what CJ uses in their pre-amps. I was hoping to gather more real world experience.