Hello mrrobot
I too have the Naim Statements (previously had the 500/552) with a CD555 and 2 555PSs with custom made Grandinote Mach 36 speakers. I had the standard Naim cables as well as the Naim Powerline and Hi-line interconnects. When I switched out the Naim cables, one at a time, with Luna Noir cables (speaker, powerline, interconnect and XLRs) I was floored with the improvement. It was like listening to an entirely upgraded system.
I would strongly recommend trying the Lunas. If you contact Danny Labrecque (the owner and designer (as well as the hand builder) of Luna Cables, he would probably be willing to loan you samples to see for yourself. Danny used to be a Naim tech so he is intimately familiar with all things Naim. Luna is located near Quebec, Canada.
Good luck,
Mitch