I’m not going out on limb by nominating the The Borresen M1. However disclaimer.. have not actually heard them yet.. so skip to the last paragraph, but on the M1’s, I have read about the engineering and have heard other Borrensen and Raidho stand mounts so would be surprised if these aren’t at the top. I’ve also read great things about the Fleetwood DeVille, but haven’t heard them.
For what I’ve actually heard.. First consideration would be to Audio Note AN-E/SPx AlNiCo. Fritz’s stand mounts are really good for the money, as are Klaus Bunge’s Kismets, which I fondly remember. I also like the latest Vimbergs, and the latest big QLN’s. I’m not in the BBC LS3 5a or KEF LS50 camp. I’ve got an old pair of NEAR 10m’s in my bedroom which I prefer to those using the proper sources and cabling.
For all the stand mount speakers which I’ve actually heard.. which for my money, besides disappearing.. imaging, they must have weight, dynamics. I would choose (and did) the Ocean Way Audio Eurekas. The caveat being.. they’re driven by high powered high damping factor GaNFET amplification. Time alignment.. sweet, detailed, dimensional.. image like mad.. sound like big really well engineered 3-ways.