In the course of comparing the ESB '93 and '97 mixes to determine how best to edit them together, I came to an interesting realisation--some of the edits actually work better in the film than I had previously thought. I'm thinking in particular of the transitions from Dagobah to the Imperial fleet after the cave scene and the X-wing rise; if you listen to the music on its own, the edits would sound bad, but in the film they work well. The Imperial march theme is already bordering on overuse in the film as it is, and by adding two more bombastic statements it becomes too much, especially since there isn't anything happening onscreen to merit such loud music at those moments. The more subdued segments that were spliced in call less attention to themselves.
So . . . what that means is that I've changed my mind about using the SE mix to replace those two parts of the soundtrack. I will still be replacing Boba Fett's departure from Bespin, though, because the editing in that part is really choppy and I don't like hearing it. It will be arranged in such a way that the only apparent change is the unedited music as heard in the SE, but with none of the dialogue differences (ie no extra Chewie vocalisations when Lando is being strangled, and no extra yells from Luke when he is pwned by Vader in the following scene).
Fans of the original stereo mix will be pleased to know that the 5.1 will also contain the snowspeeder crash sound as heard in the 35mm version.