My choices would be either the top photo ( -50) or the soon-to-be-out bowling shoe livery.
For their current/new livery, I would have preferred that they kept the old NW
compass logo and titles along with the larger red coverage of the bowling shoe livery but just changed the lower part of the plane to the new silver (any titles and logos on the silver part would still be done in black).
"TransEastern! You'll feel like you've never left the ground because we treat you like dirt!" SNL Parady ad circa 1981