I tried watching portions of Sith the other night and it was hard. Aside from Mannequin Skywalkers abysmal acting, the script/dialogue made the other decent actor look crappy as well.
One idea I thought of was to edit (greatly) the really cool scenes (preferably no dialogue) into one movie that quickly tells the back story of pertinent details leading up to R1 and then ANH. As bad as they were, there are some scenes that I still enjoy today.