Since you already have dual subs and a ’larger’ room, I’d look into scoring a pair of Impact Monitors (B stock, if new is over your budget). Herb Reichert recently reviewed the Impact Monitors (current Stereophile issue) and he has the Kef LS50s as a loudspeaker in his ’associated equipment’ listing. I believe you will find his review will address the needs you bring up in your post.
Also take a look here: https://forum.audiogon.com/discussions/tekton-impact-monitors
All the best in your quest.