Speaker Cables for Sopra 2 & PremaLuna Dialogue

I've had the Sopra 2 for almost a year and the Dialogue integrated for 2. The combo works pretty well IMHO and I'm really enjoying getting back into the hobby. My current speaker cable is bi-wired LAT Int'l SS-1000D which have served me well over the years. I'm looking to upgrade the speaker cables and have narrowed the search to Nordost Heimdall 2 and possibly Acoustic Zen Hologram II. I'm hoping to hear from those with direct experience with these cables - at least with the Sopra 2 if not both amp & speaker.

Thanks in advance and happy listening!!