I don’t know about the Brendel/Marriner.
For the piano concertos, I would recommend either the Kempff/Leitner series on DG for traditional performances, or the Demus/Collegium Aureum on German Harmonia Mundi for original-instrument HIP.
For the symphonies, there are some fine performances by Benjamin Britten on Decca, Fricsay on DG, and Karl Bohm on DG.
Don’t forget the amazing classic Marriage of Figaro with Giulini and the Philharmonia on EMI.
The best performance of No. 24 in C minor IMHO was done by Robert Casadesus with The Cleveland Orchestra under Herr Doktor Szell back in 1961.
Casadesus also plays the interesting cadenza written a century later by Camille Saint-Saens. I’ve tried that one too in this concerto and it does work in performance rather well, although Hummel’s is the more standard one....especially if you’re playing and conducting from the keyboard as I did. Its far easier to bring the tutti back in correctly under Hummel’s sustained trills than the staggered octave crescendo in the Saint-Saens 1st movement cadenza.
Plus don’t forget the deft and sparkling performances of the concerti by the late and relatively unknown Austrian pianist Ingrid Häebler, especially the D minor K466.