I have the Nait 5i connected to Naim CDP 5x, but I am not using the Naim stock DIN. It works well enough, but I took some advice from a Naim enthusiast and dealer, and ended up with LFD interconnects, standard RCA style, with a silver solid core. I greatly prefer them to the stock DIN. A bit of heresy perhaps, but works for me; substantially greater air and transparency, no appreciable loss of Naim virtues.
-paul-