A Mixamp is an amp that has Dolby Headphone built in. It pairs well with those spacious analytical headphones giving you a huge soundscape.
If you want the absolute best for competitive play the K701 is your headphone. In stereo they sound similar to the 702 but the 701 has an endless soundstage. In general dry, bright headphones go well with the mixamp and make the best gaming headphones.
Ah right thanks very much, which Mixamp did you use in your review then? As I'd like to get the same, as what you described in your review regarding the 702's is exactly what I'm after