You`re absolutely right....the Kirk Douglas film. I always get that mixed up with Price Of Glory, the brilliant book about Verdun by Alastair Horne, which I`d stick my neck out and say is the best book I`ve ever read about WWI.Paths of Glory I'm sure you mean?
While the number of WW1 movies compated to 2 is tiny there are a few other good ones - Gallipoli, The Water diviner (post WW1 really) and Beneath Hill 60 are three good Aussie ones. And not to forget Lawrence of Arabia.
Gallipoli, is a great film too, as you say.