All just my personal opinion
Concert Review, Gringolts Quartet @ LAC, Lugano, 2017-04-21 — Beethoven: String Quartet No.6 in B♭ major, op.18/6; Dutilleux: “Ainsi la Nuit”; Beethoven: String Quartet No.8 in E minor, op.59/2, “Razumovsky”
Zurich, Tonhalle, 2016-06-21: Fazıl Say, Gábor Boldoczki, Willi Zimmermann / Zurich Chamber Orchestra (ZKO) — Handel: Suite in D, HWV 341; Dmitri Shostakovich: Piano Concerto No.1 C minor, op.35; Ludwig van Beethoven: String Quartet No.11 in F minor, op.95 (arr. Gustav Mahler)
Concert review, ETH Zurich, 2016-01-19: Quatuor Sine Nomine — J.C. de Arriaga: String Quartet in D minor; Shostakovich: String Quartet No.7 in F♯ minor, op.108; Borodin: String Quartet No.2 in D major
Concert Review: Igor Karško (viola) and the Camerata Zurich at the Tonhalle Zurich, playing compositions by Rossini (String Sonata No.1), Beethoven (Eyeglasses Duet), Wolfgang Rihm (Erscheinung), and Franz Schubert (String Quartet No.15 in G major, D.887)
Franz Schubert, String Quartet No.15 in G major, D.887 (op.116): a comparison of 3 recordings, with the Melos Quartett Stuttgart (1978), the Emerson String Quartet (1998), and the Artemis Quartet (2009)
Mozart: Adagio & Fugue in C minor, K.546 — Hagen Quartett / Chiaroscuro Quartet;
Mozart: 6 Variations for Piano & Violin on “Au bord d’une fontaine” in G minor, K.360/374b — David Oistrakh, Paul Badura-Skoda / Petra Müllejans, Kristian Bezuidenhout