When rewatching some select episodes (on Blu) recently, I was disappointed to see noticeable DNR in every episode. I never noticed this on the first viewing back in 2009, but that was on a 42 inch, 720p display. With my 1080p projector the lack of fine detail was apparent.

I remember seeing a screenshot comparison between the season 1 Blu-ray and HD-DVD, which revealed slightly more DNR in the Blu-ray, but I can’t find it now.

Perhaps HD-DVD rips would be the best starting point? (At least for season 1).