I added arditti’s rec because theirs is the best of Ligeti 2nd. Their Ligeti 1st isn’t as good as Hagen’s.
Arditti Quartet
Ligeti 2nd String Quartet
Hagen Quartet
Ligeti 1st String Quartet “Metamorphoses Nocturnes”
Lutoslawski String Quartet
Schnittke Canon in memoriam I. Strawinsky