Koren came out with a KSS version in 'nusach Sefard.'
Is this the nusach of ha'Ari? I'm not too familiar with nusach Sefard/nusach ha'Ari. I like Koren's layout and aesthetics, and I've used their nusach Chakhmei Maroko (Avoteinu) siddur and love it. I've used both sefardi and azkenazi siddurim (family is moroccan and lithuanian) and am interested in the Ari's concept of a 13th gate for people like me, but I want to make sure I'm using his nusach. If the Koren edition isn't the Ari's nusach, is his available anywhere?