It would be the 1997 SE though, what is the point of that? Unless you want the 1997 SE, I guess.

Here are the real options:

1) Negative re-construction. Most expensive, but highest quality. Would require some clean up, and a lot of digital stitching unless you did it physically (which is more work and more risk).

2) Seperation masters. Almost as high quality, but requires 3 seperate scans and a digital composite of the 3 layers. But wouldn't require any clean up.

3) Interpositive (probably the 1985 home video version is the best available). Quality is good, but would require clean up.

4) Fine grain masters or Technicolor prints. Quality is presentable, would likely require little if any clean up.

Option 1 would probably cost a few million dollars for the whole trilogy. Option 2, probably 1/4 of that. Option 3 would cost up to a million for the trilogy if you start doing heavier restoration/clean up, option 4 a couple hundred grand. Take your pick. All of these options are relatively easy, the material is all there and its all in decent shape.