The biggest finale in classic music? My vote is for the final movement of Bruckner's 5th Symphony, and specifically the gigantic coda which puts an exclamation point on the massive fugue Bruckner played out for the previous 25 minutes.
One of the great Bruckner conductors of the 20th and into the 21st century is Stanisaw Skrowaczewski, and his Bruckner cycle with the Saarbrucken Radio Symphony, as be was pushing 80 years old is magnificent. The 5th is no exception.

On CD