Howdy,
so I have similar issue, however mine have always been just making my DV footage not look blocky in the Reds, Greens(maybe too much saturation) on a HDTV (SD footage just played back on a DVD on a HDTV and it looks bad). So I just got a new computer that can finally handle running ProRes without taking hours. I tried the settings you have and it looks very good. One question I have is what are you settings for compressor, any other tweaks you have to make it look really sharp? I am always trying to make a better product and alway will to listen to others. My final output is 99% DVD to clients, I shot Children’s musicals and the colors are tough because lighting I have no control over.
🙂