Initialling I found a Phantom Gold very impressive compared to my floor standing three way active speakers, not better, different, but for the size delivering as much as I wanted.
However, as reported by many owners to get the balance between the bass and tweeter you end up playing the Phantoms louder than you may like. Great for "serious" listening but not so much for listening to the radio, TV or as background music from your own music library or streaming. My floor standing speakers will maintain the balance even when at much lower volumes.
Most of the new wireless speakers that are offering streaming, DSP, active amplifiers convert all signals in to digital (even RCA and 3.5mm)and don't scale up to a surround sound system. Lag with video is seen in most. Devialet were bad on UPnP and optical input from a TV but the DOS 2 software eventually fixed the issue.
From B&O their Mozart speakers have a steaming module (Emerge, Level, Balance). When new digital connections replace the exiting ones and streaming services change software and or a hardware update is possible. The module can be replaced by the B&O dealer. That assumes B&O continue, if they crease trading or get bought out all that could change. Buchardt also have user removable electronics so if they break can be sent for repair without shipping the whole speaker.
The B&O Emerge and Level use the same drive units (doubled up in the Level as it offers a stereo speaker in one unit). The room correction works and you have control over that from the app. The audio from a pair of Emerge or pair of Levels is not bass impressive as the Phantoms, not even when compared to the small 98dB ones but for most of the time is just a better experience and easier to live with. The Levels have batteries so you can move a pair to another room and they will reset the room correction when placed back down. The B&O have a wider frequency range than the Kefs but not down to the 14/17 Hz of the Phantom models. Emerge and Level have a lip synch issue on Toslink from a TV and casting from a computer (wireless or Ethernet) as the delay is 330ms. Chrome Cast or Apple 4K TV gets around this.
Other speakers in this area are the Linn Series 3, B&W Formulation Duo and Flex (Flex do scale up to surround by adding the Bar and Bass but not the Duo), Adam Audio (Active only or DSP Active), Genelec and powered speakers like the Kanto and Michell Acoustics.
For multi-room Devialet, B&O and B&W Formation do support this. WiSA speakers do with a mix and match (B&O 18,19,20,28,50,90, Harman Kardon , Buchardt)
Without an A/B direct comparison I expect most would be happy with any of these for use with most music sources.