as far as if open headphones would bother your fiance, it depends on how loud you play volume and how close you are. if you are across a room and keep volumes reasonable then you may be fine. if you like to play volume loud then you may have an issue. keep in mind that even closed cans will leak sound just less. you cant pump the volume up on closed cans with anyone nearby either or they will hear a little bit as well. another factor to consider is if she is easily disturbed when sleeping or not. its not a black/white scenario and depends on many factors whether or not you will be okay with open or not.
a900x is the closed version of the ad900x which is a bass light wide soundstage headphone used for gaming oftentimes. it has a little...