After recommending their Shostakovich last week, I was exploring the other videos that the Frankfurt Radio Symphony has up, and was knocked over by their Sibelius Third. Here, listen to this.
Notice particularly the timpani at the key change in the slow movement (20:00) and the remarkable sound of the violas throughout the finale, especially when they take the lead at 26:30.
The Third is Sibelius's greatest symphony, but people rarely pay it much attention. They will after they hear this.