Verdi/ Callas/ Kraus/ Sereni/ Ghione - Traviata

Is this March 1958, Lisbon La Traviata by Giuseppe Verdi the best on record? Having in your cast, at that time, the role of Alfredo Germont sung by the great and classy tenor Alfredo Kraus surely enhances a recording's prospects toward that nomination. With Maria Callas as Violetta and Mario Sereni as Giorgio Germont, and also including the complete Radio Announcement which is missing on all other releases of this performance, and in excellent sound due to direct master tape transfers, it surely ranks high.