RCA Interconnect recommendations

"Of all the cables that don't make an objective difference, interconnects are those but what absolutely does make a difference is expectation bias."

On this, I have to disagree.  I'm not a cable snob and definitely believe that the law of diminishing returns kicks in pretty quickly.  But comparing three interconnects that I happen to have on hand (Cardas Ultralink 5C's, AudioQuest Red River and Graham Slee CuSat50), there are very obvious differences in them.  The AudioQuest is too bright and definitely fatiguing.  The Cardas is not as transparent.  Right now, the Slees clearly sound best.  

"Do you mean Quadlink or Hexlink instead?" 

I meant Quadlink!   My bad

"If so I can share first hand most of the older QL/HL 5C cables from Cardas are nowhere near what any of the next iterations past few decades of Clear, Reference, Reflection, Beyond series. Cardas periodically shares there are fake counterfeits and junk copy Hexlink out there too."

Yes, these Quadlinks are about 30 years old.  My dad bought them after he retired when he was working at a high end stereo store, so they are legit. 

"With cables, once you get to a certain point, it  Becomes the law of diminishing returns."

Totally agree.  Maybe people with great ears can continue to hear significant sound improvements up the price chain, but for me, with somewhat diminished hearing, I can't justify spending more than $200 to $300 on interconnects.  

I've ordered a pair of Blue Jeans interconnects and will have a friend come over to do a blind listening session with me.