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

BBC LS3/5A - Rogers, Goodman's, Chartwell, Spendor, KEF ... all produced them! They still command high resale prices - around $2K/pr. I have the Rogers. Yes, they need a sub for the bottom octave but the rest of the frequency range is so well balanced that nothing seems amiss!

In whose room with what amp? I like active speakers but if I chose passive the Focal Diablo Utopia and their custom stands.

"price no object?"

Where do you live? LOL!

Best I have ever heard is the Nola Micro Reference, but I bought them 9 years ago and haven't really listened to anything since then.  I'm sure that the state of the art has moved since then.

I don't know if it's the best as I haven't heard many, but I have the Reference 3A Reflector's that I'm very happy with.  I had to downsize to a smaller room and sold my Legacy Focus as they were too large.