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

No such thing. There are many that are very good and they all sound different. So it's the one you like. In my case the one I'd pick.

That’s a loaded question ,for everyone has their own perspectives 

i am buying a MBL standmount either 120 or 126 

since I use good subs for the bottom end under 50HZ it’s a great Omni directional speaker.

Marten is another excellent Loudspeaker  using ceramic drivers.

both are excellent in.  Every respect, 

there are many others , you decide what is right for you !

Lalik gets the cupey doll!

The TAD looks like the Kii Speaker which I thought might show up

here. 

Any love for the Vimberg Ameas?

Others-Don't get hung up on wording. Just tell me your favorite 

Stand Mount.

Bose 😜 cubes . 

A little biased, but I have never heard a better stand mount than the Sonus Faber Guarneri Homage.