I had a pair of HD800s for awhile. They are SENSATIONAL! I drove them with an Audio-GD NFB-12, Cambridge DACMagic Plus, Oppo BDP-105, and ALO Audio Pan Am. The Pan Am sounded gorgeous with the HD800s. I ended up selling my Audio-GD NFB-12 and keeping the Pan Am. However, I did not keep the HD800s. My preference is to spend less on headphones and more on speakers. For my needs, $1500 was better put towards my multi-channel and 2-channel audio system.
I did game with the HD800 using the Oppo BDP-105 DAC and Headphone output. I highly suggest you DO NOT blow that kind of money on headphones if you're 70/30 gaming and music. The HD800s were not anything special for gaming. They were magnificent for high quality audio. But you're really wasting money if you do not exclusively listen to music with these headphones.
You would be better off to get something like HiFi Man HE500s and a much better amp/DAC. As opposed to the HD800 and a really poor quality amp and DAC. The HiFi Man HE500 is consistently rated at the top of the performance leader boards for not only its performance, but also its performance per dollar. Realistically, if you don't spend more time critically listening to music I would not even recommend the HE500s.
I think the best solution will be the Sennheiser PC363D
or Sennheiser PC350 SE
. Considering the amount of gaming you intend to do with these headphones, you'll be better off buying a high-end "gaming headset" and occasionally using it for music listening instead of buying a high end "audiophile headphone" and only occasionally using it for music. Plus, you won't need a fancy amp with the Senn PC series and you'll have an extra $1500 in your pocket!Edited by Greg121986 - 6/5/13 at 12:01pm