I've tried many cables, including some costly ones, but still using the old Zu Audio wire: Libtec speaker cable and Varial interconnect. There is something about these long discontinued wire that makes it a keeper. Perfect mix of neutrality, transparency and musicality.
Also using a Kondo silver interconnect (which is far from neutral) for my old modded RA Opus 21, but they are just a match made in heaven.
Also love the old Cardas Golden Power cables and still using it in my system as well as Shunyata Python.