Just a note about this:
I would most certainly have missed a few details in a mix if the speakers were less linear than they claim to be.
If a monitor is hyped on a certain range of frequencies you can get more detail. Linearity serves the purpose to make all the sounds be heard the way they were recorded regardless their frequencies. Not necessarily more detail means more linearity, even tho this can be desirable at times
What matters most in the studio IMO is to learn how your monitors translate on other systems.