Hello everyone. I just recently built my first gaming pc and was doing some research for a good set of headphones. I think I'm sold on Audio Technica's ATH-ADG1x. After reading some reviews I keep hearing about "DAC" with plenty of people basically saying it's a necessity. I do want a great gaming experience, I'm very much into FPS games but I play a wide variety. I would also like to enjoy movies/ music on my PC. How important is this "DAC"? I am just now leaving the console peasantry so bear with me.