Daniel Beland wrote:

>I still need to discover many 20th century composers, from
>Foulds, Haba, Sulek and Tournemire to Golijov, Goebbels (Surrogate Cities?)
>and Grisey.

Foulds - Dynamic Triptych (it's a piano concerto). There is a wonderful
Lyrita CD coupled with the RVW Piano Concerto arguably the 2 best British
piano concertos.
Other pieces to add to your list:
Bernard Stevens - Piano Concerto
Howells - Hymnus Paradisi
Holbrooke - The Raven
Sorabji - Opus Clavicembalisticum
Truscott - Elegy

Tim Horwood