Fresh off the release of the recently-reviewed NS200 is Swedish headphone company NOCS' NS600 ($99), featuring the same deliberately minimalist three-button remote and mic, carrying case, and multi-size silicone eartips, with different in-canal earphones at the tops of its Kevlar cables. Inside each of the metal NS600 earpieces is a single micro armature audio driver, an upgrade from the dynamic speakers used in the lower-end NS200. This model is…