Looking at compensated responses beyond 2kHz can be very misleading and will drastically change based on the compensation curve used. Most headphones will drop after 1kHz. Comparisons can only be made for headphones measured of other headphones on the same rig using the same compensation curves. Even there ,beyond 2kHz, measurements have to be be used cautiously, as what we have seen
and shown that what we see in graphs is not what we always hear.
Statements such as 'There is a huge dip in the 1-5kHz region' based on graphs is plain wrong. LCD-4 follow the ideal response up to 3kHz. Beyond 2-3kHz, it is very hard to trust measurements, and there is a good deal of subjectiveness. That said,
LCD-4 is as close to a natural presentation as it gets, and I would not adjust beyond 2dB in the upper-mids to accommodate for personal preferences.
I understand one would like less or more energy in different parts of the spectrum and that is personal preference, and there is no single headphone that would please everyone. There is no wrong or right, and one needs to choose the cans that make him/her smile.