Thanks skywalker89, but unless I'm mistaken it sounds like the GKar and TB releases would still be superior to your DVDs because they have good sound. However I do have a problem with how they sound because they are both PAL, so they sound a bit too high pitched (I don't know if there's a way to play PAL releases so that they don't sound this way).

They are also sourced from HD broadcast, not laserdisc. They may not be true HD captures, but they have a good picture (I noticed the GKar was one of Harmy's sources for his Return of the Jedi Despecialized HD).

I've quickly looked at the two of them and it seems like the GKar is slightly better looking than the TB (just by a little bit), but with the TB you get the English opening titles.