I looked at multiple headphones including the hd650. dt 880, dt 990, hd 600 and the hd 558. I have tried the AK Q701 but those were too uncomfortable for me to wear for extended periods of time which is not good for gaming, so i had to return them. I looked at various forms with them saying that a AMP and DAC is required to truly get the sound out of high-end headphones. But i figured that since my sound card has a built in amplifier(Sound Blaster Z 5.1) that i can bypass buying a amp. Is the amp on my soundcard good enough for high ohm headphones?I also wonder out of these headphones which one will be better for sound card? Are there better headphones that complement my sound card more? I am looking for headphones that i can use for gaming and music equally that offer a great sound stage but also offer balanced and natural sounds.