Biwired Speakers - silver for high, copper for low

Had the Nordost SPM for many years - needed a WAF thin cable that I can run under the rug. Have recently changed my speaker placement - can now use other cables (within WAF limits - no ugly fat black snakes).

Have tried numerous cables to replace the SPM. Am looking for more body. Found in general, silver cables give more extended high, greater transparency, even delicacy (if well executed) but never quite enough body or bass weight. On the other hand, high purity copper seems great for warmth and body, but you lose some transparency and detail.

So have tried Ridge Street Poiema (silver) for high and home brewed cryoed high purity OFC for bass. On teh whole seems to work well, but have some nagging doubt with integration. I swear I hear something that is not supposed to be there. May be phase shift issue ??

Was contemplating Omega Mikro or other more exotic ones. Any other ideas ?

Thanks