The ic's from source to pre, and pre to power amp are both critical. If I had one better cable, I'd probably use it from the source to pre, similar to using your best power cable from wall to power conditioner. Looking at your list of gear, If I were buying any new cables, I'd lean towards a warmer sounding cable which is on the musical side such as Kubala Sosna Emotion or Jorma Unity (new) or Prime (2nd hand). Though of course this is all subjective.I really want to limit the whole question to the input question.
My idea was that the signal should come as optimally as possible from the preamp to the power amp.
Preamp: Classe Audio CP-700
CDP: Classe Audio CDP-202
AMP: Krell KSA-200 S
Speaker: Duntech Princess C-5000
Power Cleaner: MFE -NF 2
Power Cords: Nordost Walhalla
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