Askenase has an sophisticated approach and there is nothing flashy about his performances .... although there are some more impressive Chopin recordings in my collection, I return to this one quite often (and the remaining non Chopin features have their owns merits). For around EURO 30 (like offered here)
https://www.jpc.de/jpcng/classic/detail/-/art/Stefan-Askenase-Complete-1950-Chopin-Recordings-DGG/hnum/2936329
I would grab it .... btw stellar mastering by DG ....