Mishima by Philip Glass (Kronos Quartet plays Philip Glass would be a good bet). The album Asperities by Julia Kent, just out last year, is pretty phenomenal. Systems/Layers by Rachels and Vulnicura Strings by Björk might work. Soundtrack to Requiem for a Dream.

Note that there's an album of classical versions of Aphex songs by Alarm Will Sound which is very good (their Avril 14th is inferior though)