Smooth Highs and Deep Bass

Looking for advise on an RCA interconnect that can tame the digital edge from my SS ARC CD3 mkII and also has low-end extension.

System is:
Rogue Preseus Magnum preamp (w/ Mullards), Sunfire 300, Gallo Classico CL-3’s, Blue Circle Power conditioning

Cables are:
Purist Audio Museous IC from pre to amp
Purist Audio Aqueous speaker cables
Audience PowerChords

For the CDP, I have tried Cardas Parsec and Clear Sky; did a great job of smoothing out the highs, but had no low-end.
Cardas Clear Light; too harsh, but great dynamics.
Cardas Golden Reference; too coloured.
Purist Museous; highs were not smooth enough, great dynamics.

Budget is under $500 (1 meter), not looking for a detailed cable, system already has detail.
Need smooth highs, open, with deep low-end. I’m already renting from the Cable Company and need additional assistance.