All just my personal opinion
Gustav Mahler, Symphony No.8 in E♭ major (“Symphony of a Thousand”) — Riccardo Chailly, Lucerne Festival Orchestra (Lucerne Festival 2016, Opening Concert in the KKL); with Ricarda Merbeth, Juliane Banse, Anna Lucia Richter, Sara Mingardo, Mihoko Fujimura, Andreas Schager, Peter Mattei, Samuel Youn, Chor des Bayerischen Rundfunks, Latvian Radio Choir, Orfeón Donostiarra, Tölzer Knabenchor. Blu-ray disk, received for reviewing.
Robert Schumann’s Violin Concerto in D minor (WoO 1 [H/K WoO 23]), in the new recording with Isabelle Faust and the Freiburg Baroque Orchestra, directed by Pablo Heras-Casado, compared to a recording with Christian Tetzlaff and Paavo Järvi / RSO Frankfurt
Mozart: Violin Concerto No.5 in A, K.219 — comparing two non-HIP recordings with the following artists: Pinchas Zukerman / Saint Paul Chamber Orchestra (1982), Vadim Repin / Yehuhi Menuhin / Wiener Kammerorchester (1998)
Mahler: Symphony No.5 — comparing recordings with the following artists: Walter/NYPO (1947), Haitink/Concertgebouw (1970), Solti/Chicago SO (1970), Abravanel/Utah SO (1974), Sinopoli/Philharmonia (1985), Bernstein/VPO (1987), Abbado/BPO (1993), Zinman/TOZ (2007)
Prokofiev: Piano Concerto No.2, op.16 — comparing recordings with the following artists: Yundi Li, Seiji Ozawa, Berliner Philharmoniker (live, 2007) / Yuja Wang, Gustavo Dudamel, Simón Bolívar Symphony Orchestra of Venezuela (live, 2013); comments on “blind” comparisons on the radio
Chopin: Piano Concerto F minor, op.21 — comparing recordings with the following artists: Askenase/Ludwig (1963), Avdeeva/Brüggen (2012), Haskil/Markevich (1960), Rubinstein/Barbirolli (1931), Rubinstein/Steinberg (1946), Rubinstein/Wallenstein (1958), Rubinstein/Ormandy (1968)