Symphony box set recommendations


I'm looking for recommendations for box set cds containing the collected symphonies of Dvorak, Mahler, Bruckner, Shostakovich and Prokofiev.

Ie, which conductors' versions would you recommend?
jimjoyce25
Shostakovitch - Haitink's cycle is great. The premier Mahler conductor today is Claudio Abbado. For Bruckner, you can't beat Giulini, but I don't know if he ever recorded all of them. Not sure about complete sets of Dvorak or Prokofiev.
I should have added that I'm referreing specifically to the Giulini's VSO recording of 2 now on Testament and the DG recordings of 7-9.