Symphony 5th - best recording

It might be Mahler? Or Shostakovich? There are several "5ths" that are still world famous (even if they did not appear in "Clockwork Orange" which, btw, is not suitable for a three year old!)

Now we have established that it is Beethoven, I am partial to Christopher Hogwood's version using instruments available at the time Beethoven was alive (or replicas)....rather than modern variations of these instruments.

That way you hear the performance closer to what the composer intended or heard or, in the case of Beethoven, may not have heard, except in his head.