I tipically use EQ to adjust the sound of the output, which more often than not are headphones, to my preference. I don't use curves, just listen and compensate whichever frequencies I find too quiet or too loud, aiming for an overall more "balanced" sound. Pretty similar, I guess, to what you are aiming for with the process you described.
However, bear in mind that with headphones it's not always correct to aim to a completely flat curve, as resonances in the inner ear have to be accounted for (maybe someone with more knowledge could clarify that?). That's why you sometimes see bumps around the 7000hz mark in headphone response graphs.
You can also look for headphones that sound good to you without the need for further EQing. Perhaps in your area there are stores that let you try before buying, if not it's pretty much a guessing game I'm afraid...
However, bear in mind that with headphones it's not always correct to aim to a completely flat curve, as resonances in the inner ear have to be accounted for (maybe someone with more knowledge could clarify that?). That's why you sometimes see bumps around the 7000hz mark in headphone response graphs.
You can also look for headphones that sound good to you without the need for further EQing. Perhaps in your area there are stores that let you try before buying, if not it's pretty much a guessing game I'm afraid...