I've been a fan of Mark Morgan since PS:T. Annah/Deinoara's theme still sends tingles down the spine whenever I hear it and he really captured the otherworldliness of the setting with pieces like the smouldering bar theme and the general ambiance and instrument choice. Justin's music for the pitch was also top notch, if a more traditional style.
Smoldering Bar
http://www.youtube.com/watch?v=_4QINNwR6Nw
Smoldering Bar (alternate)
Can't we have both?