For anyone after a 4K bargain and after the same features as the KS range, it would be wise to try and pick up a 2015 JS model 8500/9000 (possibly the US 8500 has higher lag) JS has lower peak brightness but sustained 550 ish, which the KS falls to anyway, but crucially JS models have HDR playable in game mode, which will be in the low 20's, 93% DCI, 1080 motion res with no strobing like the KS range for TV and films,
But you can have cinema black for JS (unlike KS) as the LED's are placed vertically, looks nice in games and films.