I've seen The Testament of Dr Mabuse, which was outstanding.

We used to have a problem when I ran the FTI Cinema that we'd get sent 16mm reels of silent films to screen, and they'd actually be silent - no sound whatsoever, and the accompanying CD that was supposed to be included with the reel would never be there. Cue a frantic chase through the building (we usually only got the reels at the last minute) to find any CD that would be suitable.

My projectionist had a Dixieland jazz CD on standby for when we screened silent comedies, but that would never be appropriate for serious silent dramas. Michael Nyman and Philip Glass soundtracks work really well, though.

If the second half of Dr. Mabuse, the Gambler is as good as the first (and I have no reason to think it wouldn't be), I'm probably going to buy the box-set of Fritz Lang Mabuse films sight unseen. Very rare for me to purchase a flick I've not already seen, let alone a set of them.

That's a nightmarish scenario with the silent films. I have to say though that the 1920 version of Der Golem works quite well with Danny Elfman's soundtrack to the first Tim Burton Batman film. That said, I keep having the urge to buy the Robocop soundtrack and try it with that.