Other than at the Lucasfilm Star Wars celebration events where the screen the 2004 video versions in DLP, as far as i am aware before that all legally screened prints were the 1997 versions which i don't actually hate too much compared to the 2004.
If i had to choose i would pick a 35mm print of the special editions 1997 with correct colors and star wars with no botched sound mix.
But i prefer the 77 version especially the dye transfer Technicolor one above all.
The one 97 version that dissapointed me soundwise was Jedi, the music seemed to be dialed down or crappy because of digital fixing of the pops or analog noise in the original recordings. In fact thanks to Rinzler even empire spposedly had sawpped shannels on some scenes.
Star Wars 97 version was not effected, even if its Dolby mix was not as good as its prior theatrical 77 6 track dolby mix in 70mm.