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.
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.