Long time lurker to this thread and thanks to everyone who has posted and to MLE for the awesome information. I quickly realized I was a complete noob when it came to headphones when I didn't even know what 'open-back' headphones were until I read through this thread. I have been a long time COD player (World at War), nothing competitive, just pub stomping and I have until recently thought that the 'big' headset companies where the best of the best. I have been rocking the PX-21's for awhile now and just recently started looking into upgrading. First off, I don't know if I just bought a good version on the PX-21's but the major hissing issue that MLE spoke about, I haven't been a victim of it. Don't know why. I started gaming on the PS3... worked like a charm, then switched 360 after getting pissed at the PS Network. Other than being held together by super glue and electrical tape, the stereo sound has been great. I recently (12/20/12) purchased the 2013 Mixamp after deciding I was gonna go for the Mixamp + PC 360 combo. Of course my Mixamp has had the major issue you've read about... the sound just... cutting out. After hours of switching out cables, I took to the knowledge of the people (this forum) and replaced the usb power cord with an old PS3 controller charger. I just got done with about a 3 hour session and didn't have one problem. Now, I'm not sure what firmware came on the Mixamp since I just bought it, but I have not updated the firmware yet. I've read that after the update some people have had problems with voice. That part I'm not sure of because my current setup is the Mixamp, Klipsch Reference One's (still trying to find a deal on a headphone/set), and my Kinect being used as my mic. I play on a 23" ASUS EVO monitor, so I sit close enough for the Kinect to pick up my voice... sounds like I'm in a tin box but hell, it works for now. Oh, the Mixamp + headphone is >>>>>>>> PX-21, but I do find is very bassy but I think that has a lot to do with the closed Klipsch headphone. Anyway, long enough first post... and to MLE, thank you again, just wish I had the budget to try as many phone's as you without my wife KILLING me. P.S. I have been looking at purchasing the AKG Q701's used from Amazon's Warehouse for $171 USD, anyone who has had any experience with the Amazon Warehouse... any input would be MUCH appreciated. and to anyone who wants to play some Domination hit me up... dunaway1924