no.7 is difficult --there are no ideal recordings I've come across. Talich is probably the greatest, as Bigshot said, but then the sound is 1937! The problem is balancing the introspective and intense emotions of the first two movements (esp. the second) with the more extrovert and rustic final two. Kertesz, an outstanding conductor in the earlier symphonies, is too matter of fact in the slow movement, for instance, and most conductors rush this.