Given everything you listed I think the only option for you is to try them and experiment. Some cable retailers let you audition them for either free or a nominal fee.
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I don't think I would go with the Nordost Heimdall. They would definitely be the lean and sharp character you are expecting because of the silver-plated wire. The Focal speakers are very hard to make sound good because they are so lean and fast. They essentially have no character and a lot comes across as sterile or flat or sharp.
The Wire World Eclipse model is likely going to be a good option. I have tested the Eclipse level XLR interconnects, which use the exact same design. They pretty much separate out all the strands, so it's practically a true solid-core approach (just using very small strands). They have excellent resolution and all the sound is there, but it's just very tiny bit slightly laid back / soft. But not in a bad way. Like I said, all the high frequency resolution is there. It's just not quite as good as my reference cables (hand built). It's a pure copper using OCC copper, but with silver-plated connectors.
The Kimber Carbon 16 might also be a good option. Just be aware that if you choose gold plated connectors, it may warm up the sound too much for you. The Kimber PM33 spades are very neutral and fast.
How long did you run in the Canare 4S11 cables? I spoke with Canare and was told the cables sound their best with 400 hours on them. Canare doesn’t know why but stated it as fact. They were right, after putting a bit over 400 hours on the cables, they really settled in.
Recently bought a longer Canare cable for my left speaker as it wasn’t quite long enough. With one new cable and one that has been used for a full year, the difference in sound is noticeable. A month later and the left cable is getting close to the sound of the right. I had speaker cables that were $1500.00 each before the Canare and the Canare is light years better at about 5% the price of the others.
Bottom line is don’t give up on the Canare. I feel it’s the best deal in all of audio. RAM Labs sells the Mogami speaker wire and last time I looked was available for sale.
I didn’t know Canare had burn-in recommendation.
I totally understand that simply higher price doesn’t mean better sound.
I begin to see cable as effect filters for photos.
Anyway, I do plan to keep Canare. It provides really balanced fine sound.
After some research, I think I drop the idea of Heimdall2 and want to try Eclipse 8 with a hope that this one is overall better than Canare.
About the Mogami, I’m talking about W2804.
This is Mogami’s reference line.
I found it Japan once, but didn’t buy it... really regret this.
2804 is extremely difficult to find.