Hairy_Hen finished a "purist" version of the ESB and ROTJ 5.1 mixes recently, if I remember correctly. As in, no changes to the content of the mixes (his initial ones had added music). So, assuming Dark_Jedi uses these (which I'd recommend), the audio content on each disc will be:

Star Wars
- Hairy_Hen's 1977 5.1 70mm Six-Track Reconstruction
- 1977 Theatrical Stereo
- 1977 Theatrical Mono
- 1985 Home Video Stereo
- 1993 Home Video Stereo

Empire
- Hairy_Hen's "Purist" 5.1
- 1980 Theatrical Stereo
- 1993 Home Video Stereo

Jedi
- Hairy_Hen's "Purist" 5.1
- 1983 Theatrical Stereo
- 1993 Home Video Stereo

It's been established that the "1985 mixes" for Empire and Jedi are identical to their theatrical mixes, and I don't think it's been confirmed if there are any significant differences between Jedi's 83 and 93 mixes. The Star Wars mixes are all different, though, and Hairy_Hen's ESB and ROTJ are essentially the theatrical and 1993 mixes combined to sound as good as possible, upmixed to 5.1 with a custom LFE (subwoofer) track taken from the 1997 and 2004 5.1 mixes, plus some occasions where the bass was lifted from the 1993 mix.

If any of this is wrong, please correct me, this is just what I remember being decided.