The whole history of Middle-earth is incredible, I'd love to see "The Silmarillion" as a film too.
Silmarillion is a bunch of disconnected stories, it would be like filming the Old Testament. Any of the individual chapters and stories could be adapted to film and be better.
And I'd love to see some Silmarillion-based movies...Earandil and Elwing for story purposes, and the Akallabeth for special effects.
-Foxfire4, trailing off in geeky bliss