I understood the whole idea of balanced cables is that the opposing polarity cancels out noise, also why balanced mains transformers are a popular form of mains cleaning.
For this reason, I had a fully balanced system and used Mogami 2534 with Neglex connectors, cost $20 each. These will be found in most recording studios, often in very long lengths. Mine came from the pro store.
I don’t understand what more you want from a balanced interconnect. A copper mesh around the cable will protect against interference and costs cents, as you will find it on cables costing $2/m.
So on top of noise cancelling and electrical insulation what do you get from the extra $480 of a $500 balanced cable?
Obviously this does not apply to unbalanced cables, but then (with the exception of phono cables) I have no idea why anyone uses them.