I highly recommend grabbing this book. It's less expensive, a terrific reference and study guide, and there's plenty to learn about the craft here:
I doubt there's a film composer alive who would deny the influence Wagner had on the art form. If you want perhaps the most strikingly Epic, heaviest Metal ever, study Tannhauser, Overture to Act One.
Unbelievable, transcendant beauty:
John Williams and Jerry Goldsmith are incredible masters. But Wagner was there first, and he's just as pertinent today.
just a general wider understanding, my aim is to be as versatile as I can be within reason, so I guess the primary things are the subconscious effect it has on my writing/ understanding idioms/ ability to skim read, I've started with Holst's Mars and trying to do 5-10 bars a day if possible. (can only manage this as I'm studying a film scoring course full time) but I've picked up a lot in a few dayswhat is your primary interest in studying these scores. What is it that you want to pick up from them ?