Chainsaw Ash: You are probably correct about 70mm preserving more detail because of the larger negative size. But then, there is at least one more extra generation due to the blow up, if I am not mistaken, which is why 70mm was often very grainy. I haven't seen enough 70mm to do a side by side comparison, but your logic makes sense. Which was why I found your statement confusing:

"Basically, I want to see it as close to the way it was shot as possible. Which is why I don't see films in IMAX unless, like The Dark Knight, at least part of the film was shot on IMAX."

Wouldn't this then lead you to swear off 70mm for distorting the presentation method of Star Wars then? If you are open to 70mm, then you should be open to IMAX, is what I was getting at. 35mm films blown up to IMAX usually hold up, the same way 35mm films blown up to 70mm generally did and were considered premium releases.