Never heard it. Sorry. I would use a nice solid core wire in silk or cotton on that tweeter. Jupiter makes nice solid core silver and copper wires in cotton and silk.
Another great option, not in cotton or silk however, is the Neotech stranded silver with gold plating. Get the heaviest gauge which I think is 23 or 24 from Parts Connextion. This wire sounds absolutely wonderful, but is not cheap. Much better than the Mundorf silver/gold wire based on my experience.
Yes I would go with the Jupiter copper foil cap for sure. If you want even more air, articulation, space, and realism add a pure silver foil Duelund bypass cap .01uf. This particular combo works so well together. I have found the net result (combo) to be the finest cap available at any price.