And re the ROTJ graininess:

I found the 04HD transfer of ROTJ to be the grainiest of the trilogy. But that may ironically be because it was the least grainy and least damaged one, so it had the least extensive cleanup. The 04 transfer of ROTJ has a lot of fine grain. I was actually surprised how much film grain there is in all the 04 transfers when you have a high bitrate HD. People sometimes make it sound like it was DVNRed all the way to hell, which is definitely not the case. I actually think the clean up job done by Lowry on the 04 transfers is superb, especially given the limited time they had to do it, the problem with those transfers is the rather horrible colour issues, which seem to not be caused by Lowry.