true enough , primarily since you'de be judging a primarily mono signal .. there's no need to worry about the stereo field.
However, in my case, the headphones frequency response is completely dead wrong compared to my monitor's flat frequency response curve... a product of cheap headphones i guess.
So yeah, I wouldn't have to run around so much if I had a better set of phones that had a flat frequency response.. strictly speaking in terms of a mono signal that's being tracked of course.