For me, the new colour timing on TWOK is far more naturalistic and film like than any of the previous home video releases. Probably, neither are correct with reference to the original release, but I do feel the BD is far closer (skin tones particularly) than the strong red push on all previous efforts.
Yes the BD's all have some level of DNR applied, but believe me, there is no better way to view (or listen to) these films at home currently. Try the DVD's out on a very large display!