That’s some fine gear. I know Focals have good high end extension and clarity.
The Neutral Reference are very neutral, a different signature than the Cardas house sound, and the Cross are very coloured and warm, lacking detail.
The question now is which line of Cardas will play well between an Ayre amp and Focal speakers. You can audition cables thru The Cable Company, but since you are buying used, hopefully you’ll get some recommendations now that you have listed your components.
If you are looking for transparency and dynamics, the newer Cardas would be the way to go.