Thanks for this one ...
I will go for his Strauss and his Rachmaninoff...
There is no objective best interpretation , but there is an historical ranking by universal acclaim (for example Rubinstein Chopin or Sofronitsky Scriabin )
But one thing is certain, each one of us has his own history with music , and in our heart there is the best interpretation ever and sometimes for ever ... our heart judge not our brain ...It is how sometimes we discover some music by being stunned for life ...I was by Scriabin when i stumble on a pianist able to play him ...Sofronitsky stunned me... I am not alone...
Here’s a lovely aria called "Song to the Moon" from Dvorak’s Rusalka sung by a lovely soprano named Asmik Grigorian.
https://www.youtube.com/watch?v=Us_F2xLJgKI

