I have listened to a dozen versions of Shostakovich's Symphony No. 5. I particularly like this one, as well as the version by Bernard Haitink leading the Concertgebouw Orchestra, and the older but very famous version by Leonard Bernstein. None is perfect, probably because of Shostakovich's proclivity for concealing his real musical intentions, and I am still awaiting the "perfect" rendition. The version by Ashkenazy is excellent but a little hesitant, especially in the 4th movement. The one by Haitink is equally good; the one by Bernstein is, as you probably know, somewhat idiosyncratic, but many people think very highly of it. You will not be disappointed with the Ashkenazy version.