I compared the Krell KCT, VTL 7.5 series 3, and Dartzeel in my system and preferred the Krell KCT.
However, I preferred the NBS Omega 0 XLR interconnects to the second generation (silver) cast cables.
Which cast cables are you using? have you tried other ones? MMF, Tara Labs, Transparent, Siltech, SR?
Thanks