That finale is absolutely amazing. However, the tempo makes a big difference. I assume you know that one of the first publications of the symphony (I think it was the one used in the first American (Bernstein?) performance) had an error. Instead of quaver=188, it printed crotchet=188 which meant that the end (from bar 324, where it finally goes up to the repeated As) was twice as fast as it should have been. I have a few recordings of this:
Andre Previn (Andrew Preview!!) takes it very fast indeed but the Russians (the one I listened to was conducted by Rostropovich, but I also have a recording of Mravinsky somewhere...) take it at the slower tempo.
Both tempi have their merits, but the slower one has more impact - it really sounds like the so-called 'artists reply to just criticism'.* The end of the symphony is almost mockingly saying "you WILL be happy, you WILL rejoice". Is this not somewhat reminiscent of the regime there at that time?
I have played twice in that symphony: both times on contra. What a brilliant piece to play in, especially the solos starting at bars 157 and 181 of the second movement. The latter ends on a bottom Bb. *grin*
*That quote has dubious sources.