Sennheiser HD598 + Earforce DSS
for me by far the best from the best
I have testet many many headsets..
(Sharkoon xtatic, Tritton ax 720, Tritton ax pro, turtle beach x41, beyerdynamic dt770 pro, Audio Technica AD700, Astro A40, Sennheiser HD595, Razer Chimaera, Sennheiser PC360 )
as Soundprocessor is DSS my prefer..
I have testet: DSS, Astro MixAmp and Yamaha RXV-371 5.1, DSS has the best sound.