audiophile recordings of 12 tone/serialist works

What are your favorite 12 tone, serialist, or other 20th century recordings for pure sonic excellence?

Here are some of mine:
1. original LP pressing of Webern columbia box set (Craft)
2. Schoenberg piano pieces on nonsuch (Paul Jacobs)
3. Ligeti string quartets on Wergo (Arditti)
4. John Cage number pieces on Mode (CD only)
5. Morton Feldman 'Coptic Light' (Michael Tilson Thomas)
Just to name a few...