Reasonable high end interconnects: without breaking the bank

Nerve Audio cables are about $100/meter. Very well made and excellent conductors.
Rollin

I go with a couple of users who mention Morrow. The most obvious difference from any other cable in that range that I can attest to is an amazing sound stage with excellent inner detail. I also need to stay away from extra "brightness" as my system provides enough of that and the morrow cables have that "extra dimension" in the tereble range with things such as cymbals. The "sweet spot" in their line are the MA-4 series. The improvements are not quite as great above that, although the MA-6 speaker cables I use are amazing. At regular prices I would think twice, but they almost always have a 40- 50% off sale. 
Analysis Plus Ones (yeah, the purple cables) are also very good and a relative bargain.

In a private discussion, one of the members told me that he replaced some $$$$ Verastarr foils with Audio Envy cables. I am trying to find more information on these cables.

Have slowly upgraded RCA cables

Kimber PBJ
Van den Hul D102 III
Merlin Chopin to Verdi to Vivaldi
Now, Audience AU24SX

The Audience will be my last pair.

I recommend trying Triode Wire Labs interconnects.  I've used them and compare them favorably with the ones I moved up to, the Audience Au24SX.

https://www.triodewirelabs.com/