What is the Best Sounding Stand Mount Speaker in the world?

That is an absurd question. It took me 3 years to build the 2 systems I have in the house, both rooms were so completely different. I had several sets of Dynaudio speakers in my main listening room, and have chosen the Confidence 20 as my my main floor end game speakers. None of the Dynaudio speakers sounded great in the basement, that is where frequency goes to die. I have a set of Capriccio Continuo 311 Ad monitor Speakers, and they are amazing. sharp articulate and precise.

what if you put a $600,000  pair of magico m9's on short stands, would they be best?

I am really impressed by all the stand mount speaker brands/models  that have been posted. My budget is less. While I have mostly used floorstanders, I will not let loose of my old Reference 3A  MM MMC two ways made in Loudon France. They eventually became known as De Capos. I am still looking for a floor stander that can match the mid bass, mid range, and treble while providing a decent low end. It never ends I guess.

Maybe if you put the $150K Grandinote Mach 36’s on short stands they might the best in the world 🤔🤔 😃

Adding my voice to the chorus praising the Dynaudio Heritage Special.

This is, to me, the quintessential real world bookshelf speaker - expensive but not outrageously so, with superlative performance in a timeless package.