Extended frequency response is important due to distortion towards the ends of the spectrum. Extending the bandwidth allows the hearing range to be away from the ends. Still not necessary? ;)

Hi there, my name is Eran, from Israel and new here. I do street workouts, and my biggest motivation is music during my training and would like to upgrade my equipment :) I listen to orchestral/dubstep and hip hop mostly. current equipment:  iaudio u3 mp3 player philips shq3000   I am...