You can't audition so your knowledge will be limited. Listen to your BIL's setup. What amp is he using on the Victorys? Is it similar to yours? Can you take your amp over his house and see how they work with the Victorys? The Coincidents have very high quality drivers and are designed to work with moderate power tube amps. I would encourage you to go in their direction.
New to me speakers
Focus Nova Utopia or Coincident Extreme Reference , both 10 years old, or new Tekton V18 ? Currently have Double Impacts and Wyeteck tube amp and pre. 32 by 30 wood panelled dedicated A frame room.