New Amp... Is it time to switch my speaker cables??

I am currently using stealth audio cloude 99 speaker cables

I originally bought these when I was using a Gryphon Amp following a dealer recommendation that silver cables work nicely with Gryphon

Now however, I am using a Krell XD amp. Speakers are the Kef Blade 1s

The sound I am getting right now is incredibly detailed and transparent, but I'm wondering now if I should be switching back to copper cables. Maybe copper would give more body and musicality?

This is the description on my current cables from stealth website:

" Cloude 99' sound is VERY "fast", transparent and clear, with good bottom and top ends extension, and lots of subjective "air". The Cloude 99 work well with all types of music, but they especially shine on vocals"

I know many of you would say you wont know until you try other cables, but I want input because this would be a costly endeavor.