Verified answer

A40 with the MixAmp...but the Tritton AX720 is going to have better sound quality and costs less than the A40 and A50 headsets.

I would just get the Astro A40 with the mixamp because you need the mixamp. Astro is the only brand headset that I buy now, I don't really bother with the cheaper brands.

Astro A40 is the best headset, but it's pointless in getting it without the mix amp. The mix amp is what makes the headset different from others, it's just stereo sound instead of Dolby without it. You can get a mix amp and a different headset like a steel series siberia v2 and use it with it, it's just as good and I see a lot of people with them at gaming events.

Astro A40 .. but you might as well get X12 .. just as good and a lot cheaper !? :P