Since you are interested in Gloria RV589 (with Pergolesi: Stabat Mater), here is a list of other items that you may find interesting.
Brahms: Symphonies / Piano Concertos / Overtures / Haydn Variations
Rudolf Buchbinder (piano), Berlin Philharmonic & Royal Concertgebouw orchestras, Nikolaus Harnoncourt
[ Warner Classics / 5 CD Box Set - released 17/Oct/2016 ]
"The Berlin Philharmonic plays beautifully throughout, sounding in these 1996-97 recordings like its old, distinctive self" ClassicsToday
Concerti Da Camera II
Il Giardino Armonico
[ Warner Classics Das Alte Werk / CD - released 11/Feb/2008 ]
Originally recorded in 1992. Now reissued at a special price.
Harnoncourt conducts Handel (incls 'Messiah' [excerpts] & Organ Concerto, op.4 no.3}
Lucia Popp, Paul Esswood, Roberta Alexander, Alice Harnoncourt, Herbert Tachezi / Concentus musicus Wien / Nikolaus Harnoncourt
[ Teldec Warner Classics / 2 CD - released 1/Oct/2009 ]
Nikolaus Harnoncourt at Eighty - Harnoncourt & Handel
Nikolaus Harnoncourt conducts Monteverdi [Incls 'Il ritorno d'Ulisse in patria' & 'L'Orfeo']
Cathy Berberian, Lajos Kozma, Kurt Equiluz, Jane Gartner, Rotraud Hansmann, etc / Concentus Musicus Wien, Nikolaus Harnoncourt
[ Warner Classics Das Alte Werk / 9 CD Box Set - released 21/Aug/2014 ]
Warner Classics releases Nikolaus Harnoncourt's first Monteverdi Cycle (1968-74) He conducts Brucker and Gershwin, Beethoven, Verdi and Johann Strauss - but at the beginning of his career Nikolaus Harnoncourt, one of the most renowned Maestros of...
Bob Van Asperen
Bull: Music For Harpsichord
[ Warner Classics Das Alte Werk / CD - released 22/Feb/2010 ]
Bob Van Asperen (harpsichord)
W. A. MOZART
Il re Pastore
Eva Mei, Inga Nielsen,Ann Murray, Roberto Sacca & Markus Schafer / Concentus musicus Wien, Nikolaus Harnoncourt
[ Warner Classics Das Alte Werk / 2 CD - released 23/Feb/2009 ]
This opera was first performed on April 23 1775 in Salzburg, at the Palace of the Archbishop Count Hieronymus von Colloredo.
Pro Cantione Antiqua
El Siglo De Oro
[ Warner Das Alte Werk / 2 CD - released 5/May/2008 ]
German import (catalog 2292460032)
Anthony Rolfe Johnson, Roberta Alexander, Jochen Kowalski, Alastair Miles & Anton Scharinger / Concentus musicus Wien, Nikolaus Harnoncourt
[ Teldec Warner Classics Das Alte Werk / 2 CD - released 23/Feb/2009 ]
"One of the most popular of his oratorios in his lifetime-Handel revived it in no fewer than nine seasons between its premiere in 1743 and his death in 1759-Samson has remained a firm favourite: it was the natural choice for Covent Garden to stage...
JOHANN STRAUSS II
Strauss, Johann: Composer Series
Orchestra Royal Concertgebouw Orchestra, Orchestra Wiener Philharmoniker, Nikolaus Harnoncourt
[ Teldec / Warner Classics / 2 CD - released 17/Aug/2009 ]
Nikolaus Harnoncourt at Eighty - Harnoncourt & J. Strauss