I'd suggest you have audition the RCF TT08A. It fails on most of your metrics, its a bit tall, a bit heavy, a bit loud, and a tad narrower dispersion than specified, but, quoting, "however, audio quality is my top priority so no flexibility there", on on this score, "extremely detailed, warm sound with plenty of clean headroom", they go all the way.
They are also self-powered, so perhaps you can trade off amplifier weight against speaker weight. They are the smallest member the RCF TT series, which includes "far bigger systems".
Have a listen. You may find your ears override the other considerations.
