one thing, I know that John Williams was heavily influenced by Igor Stravinsky for his Star Wars work (listen to Episode IV especially, that one almost had Stravinsky's Rite of Spring as its soundtrack), and I would have liked to have had something like the last movement from the Rite of Spring end the Obi-Wan vs. Anakin. I can send you guys a sample over IM if you'd like to hear it although I encourage you to purchase it, since it is extremely good and is probably the most contraversial piece of classical music ever written.
Basically, it's a serious of tense themes playing over many compound time signatures and then ending in a giant, dissonant crescendo.