These interest me even though I probably already have enough headphones (All Beyer too >.<) but thought others might be interested. I keep seeing reviews like this one:
http://www.soundandvisionmag.com/blog/2012/11/14/review-beyerdynamic-custom-one-pro-headphone
They seem to be very good for money and the slider really seems to work well
  Anyone else considering these? Aimed at portable devices like phones etc but would be a half decent solution for computers too I guess 
	
		
			
		
		
	
				
			http://www.soundandvisionmag.com/blog/2012/11/14/review-beyerdynamic-custom-one-pro-headphone
They seem to be very good for money and the slider really seems to work well
  Anyone else considering these? Aimed at portable devices like phones etc but would be a half decent solution for computers too I guess 
	
 


 Push to talk is the way ahead so unless you're using your MMX 300 with a console then you need to configure your Mumble/Vent/TS appropriately