Ok so you are very impressed with with these very expensive cables. Think how good they would sound with improved sources, power supply, etc? I am old fashioned and will always stick with 'source first'. And, here we're talking about black box upgrades that would cost significantly less than the proposed cables. But if you're determined to change cables, what about the various offerings from Chord? I don't think they've been mentioned in this thread so far? Their demo at Bristol was very impressive. They must be worth consideration.
I think source first is useful advice up to a certain level, that said, things have moved on considerably since the 70's or 80's or even 90's...ect ect
But even with Source first, everything still is dependent on ones quality of cables.
Interestingly I was talking to one of the more experienced dealers at the Bristol show, and he suggested you only need to lengths of Copper wire, in my mind he lost all his credibility with that one ridiculous statement....
So IMHO, you really need the best cables you can afford, they are just as important as any black box.
I did go to the Chord demo at the show, although very impressive, really no match on the Black Diamonds..