I had a full loom of Groneberg Quattro Reference cables that Odyssey Audio sells. My Odyssey amp and speakers were already wired with the cable from the factory so I figured why not. I bought both speaker cables and 5 pairs of interconnects. I believed I had found the Holy Grail until 4-5 years later I swapped out one of the interconnects with an Acrolink cable for my Esoteric SACD player. It was night and day difference, the treble was a bit more sparkly and the midrange seemed much more relaxed.
I have removed all the Groneberg cables from both systems and now have a mix of cables that compliments each piece of gear I own. The systems are much more satisfying now.