the Alta audio Alyssa should be on your short list
the Alyssa is quite frankly playing at another league then most other book shelf loudspeakers
the Alyssa goes to an unheard of 32hz! due to a custom built long throw six inch woofer and Alta’s patented hybrid transmission line/infinite baffle design
https://www.youtube.com/watch?v=8JR9GrhwMw4
https://www.theabsolutesound.com/articles/alta-audio-alyssa/
Longtime readers know that I rarely go gaga over anything I review, but I must admit the Alta Alyssa loudspeaker is something special. For many audiophiles it could well be the loudspeaker that enters their listening rooms and never leaves. It is simply that good.
the Alta’s also use an incredibly dead DampHard multi-layered, multi-density material, which gives you a zero resonance cabinet.
The Alysa is way more efficient then the ps audio fr5 which is 83 db vs the Altas 88db so the Alta can be easily driven with far less power including a tube amplifier!
Dave and Troy