Beber said:

Are the 720p HDTV-DON releases better sources than the 1080p HDTV-hV ones? On top of being 1080p, they're the same as the 2004 Special Editions with supposedly less DNR than the Blu-rays.

Yes, the 720p DON releases are better, because they are far less compressed - the hV releases were compressed to hell and since I'm working at 720p anyway, the fact that they are 1080p makes no difference. And they are both the same as the 2004 SE but they don't have less DNR than the BD (at least the OT, it may be true for the prequels and especially episode I definitely has less DNR in the HDTV versions, as it comes from a completely different master).

There are HDTV broadcast sources, which are even better quality than the DON releases but I don't have those.