It sounds like you know what you want, and that's a good start. Based on your criteria, look for sealed speakers, powered woofer, soft dome tweeters and a 3-way design. All these things are needed for the well defined bass (sealed), good dynamics (powered woofer, 3-way), and non-fatigueing (low THD, flat treble, soft dome) sound you want to hear. For "disappearing speakers" look for wide dispersion and a good polar & power response; this will also reward you with good casual listening outside of the sweet-spot.
Good luck with a "first go around."
Good luck with a "first go around."