After reading this article on Tyondai Braxton's 'five records' for FACT, where he chose Morricone's Once Upon A Time In The West as one of his top influences, I've been thinking about soundtracks that seem to work perfectly with the film itself. Even better if they stand alone well, but it seems that his comment that soundtrack music is often the most avant garde and adventurous is pretty spot-on, as it allows work to be based around a solid theme whilst remaining incredibly fluid.

Braxton article here: http://www.factmagazine.co.uk/index.php?option=com_content&task=view&id=3542&Itemid=104&limit=1&limitstart=0

Yeah, any suggestions for good ones to check out?

Mine:
Morricone's Once Upon A Time In The West - goes without saying.

Waking Life - modern avant-garde tango/European sounding stuff that is wonderfully hallucinogenic and atmospheric, and fits perfectly with the dreamlike nature of the film itself.

There Will Be Blood - far more exciting and intricate than Greenwood's score for Bodysong.

The Assassination of Jesse James/The Proposition - Nick Cave and Warren Ellis have a good record of matching well the aura of the films they score.