When it comes to documentaries, my Favorite OT Preservation Project is Deleted Magic because of the way they show how the film could have been and then again, the filmmaking lesson.
My favorite Episode 4 preservation dvd is Editdroid, like TheCassidy and DarthAstuart wrote, it is as if it was an original release, the bells and whistles that comes with it, and also the crawl not showing episode 4 A New Hope felt as if it was 1977. It did a great effect on me.
When it comes to episode 5 and 6, I have to go with the ISOMIX set, call me weird if you want, the reason why my vote goes to ISOMIX for episode 5 and 6, it is because when we put the isolated score on , we have the possibility to put the subtitle on and it gives me the impression that I am watching a silent movie, the EDITDROID set would be perfect if we had that option on, because with the Editdroid set, we only have the possibility to put either the score on , or the movie, so ISOMIX is earning more points in my book because of that possibility.
When it comes to video/audio quality I have to go with the moth3r set, it is almost perfection.
I am looking forward to the Project X0 set, I have seen the prototype, the prototype is great, I can't wait to see the final project.