LessLoss Anchorwave Loudspeaker Cables.
I went from Kimber 4TC to these LessLoss Anchorwaves: Jaw dropping indeed! They may be 6 times the price of the 4TC, but they perform preferably (to my ears) to even the highly praised Siltech 770L, and, the Siltech's cost almost 4 times more than the LessLoss Anchorwave cables!
I'm also a fan of their Anchorwave interconnects. A very similar story there, too.