A lot of choices. Szell is excellent and dirt cheap. The venerable Krips/LSO cycle was recorded on 35 mm (film) tape and sounds great in current remastering. The Von Karajan 1963 cycle is a classic and sounds great on Blu Ray.
More modern well recorded more modern cycles that I own are Vanska/Minnesota and Herrweghe with a Flemish Orchestra both in SACD but if you have Surround Sound you really ought to sample the Tacet cycle with a Polish Conductor and Chamber Orchestra which unabashedly places the listener in the middle of the Orchestra and reveals fascinating details
More modern well recorded more modern cycles that I own are Vanska/Minnesota and Herrweghe with a Flemish Orchestra both in SACD but if you have Surround Sound you really ought to sample the Tacet cycle with a Polish Conductor and Chamber Orchestra which unabashedly places the listener in the middle of the Orchestra and reveals fascinating details