This looks like an advert and for that I apologize, but should you be interested I present for your attention. Personally, I am always suspicious of "re-mastering" and I would need to listen to it first - but then many of my favourite Wagner recordings are in mono. Mind you, it does contain some nice "extras" if you don't have them already.
The centerpiece of DECCA’s celebrations of Sir Georg Solti’s centenary is a limited-edition [individually numbered], newly- remastered, luxury edition of “The greatest recording of all time!” (BBC Music Magazine, January 2012)
Solti’s recording of Wagner’s epic music-drama Der Ring des Nibelungen was a recording project on a scale without precedent and the first-ever studio recording of Wagner’s masterpiece. Recorded between September 1958 and November 1965, it was masterminded by legendary producer John Culshaw and his technical team under the direction of chief engineer Gordon Parry. This massive undertaking set new standards in both opera recording and the possibilities of the effective and imaginative use of stereo.For the first time ever DECCA presents the most comprehensive Ring edition ever assembled.
The complete Ring cycle is presented on 14 CDs:
2 CDs: An introduction to Der Ring des Nibelungen by Wagner scholar Deryck Cooke + book with spoken text and music examples
DVD: The Golden Ring
The acclaimed BBC documentary directed by Humphrey Burton and filmed during Götterdämmerung sessions
CD: Wagner Overtures + Siegfried Idyll + Kinderkatchechismus
Recordings made in Vienna during the years when the Ring was in progress
Ring Resounding
John Culshaw’s fascinating account of the entire Ring project from inception to completion – first published in 1967 and long out of print – it is an integral element in this special edition. Exclusive to this edition.
Blu-ray disc
The complete Ring on one disc presented as lossless 24-bit files. Exclusive to this edition
The Ride of the Valkyries
Special facsimile of one of Sir Georg Solti’s working scores with his markings explained and commentary by Charles Kaye. Exclusive to this edition.
Art prints
5 high-quality art prints of recording session photos. Exclusive to this edition
Gramophone
Special 40 page brochure with facsimiles of original DECCA advertisements and reviews. Exclusive to this edition.