I would imagine the sound quality on these new discs will be (much?) better than on Naxos, as Decca obviously has access to the master tapes. Naxos would have had to use LPs as their source. <
One would like to think so, but I don't believe that Australian Eloquence does much more than reissue from previously issued CD's - I don't believe that they go back to the master tapes, if they still exist for this Meistersinger. Wagnerfan is correct - the first Decca CD issue was listenable, but not particularly good sonically; to my ears, the Naxos sounds better.
As for the performance, the major selling points are Gueden and Dermota. Schoeffler, while highly experienced in the role, was well past his best - if you want to hear him, you're much better off with the 1943 Bayreuth performance under Abendroth (on Preiser or Myto). Treptow is virtually unlistenable as Walther.
So it's a Meistersinger for those of us who collect the opera voraciously. I wouldn't be among my top seven recordings (Solti 2, Sawallisch, Kubelik, Kempe 2, Karajan 2, Goodall, Haitink), mostly because of those casting issues. I'd place in the same category as Keilberth, Barenboim, and Solti 1 - all recordings with one or more strong cast members, but with one debilitating member.