For its price SB Z definitely has very good features and works well with average headphones.
Headphone output good for any headphone is where expensive Sound BlasterX AE-5 has its strength.
For D/A conversion quality reaching human hearing's accuracy really doesn't need that special parts:
http://www.tomshardware.com/reviews/high-end-pc-audio,3733-19.html
Budget level Audigy Fx uses newer version of that ALC889 (class above your motherboard's ALC892) and SBZ has class higher quality DAC.
And if you actually want to hear game sounds gaming headsets are mostly lousy for that, because they're made with this pricing model:
https://hollywoodstreetking.com/beats-by-dre-made-in-china-for-five-bucks/
Barely any of price goes to actual product quality with PR BS taking lot more.
How did you think those gaming brands are able to afford all of their PR BS?
Takstar made HyperX Cloud is one of those rarer gaming headsets actually using more of price to quality than BS.
https://www.overclockers.co.uk/hype...4-xbox-one-mac-mobile-gunmetal-sp-003-ks.html
But if you don't need microphone would be best to forget word headset and look for headphones.
Little over £100 gives you some very good for gaming headphones from traditional audio makers.
Also if your environment isn't noisy then closed headphones lose badly in gaming to good open headphones.
Closed design makes it extremely hard to get good soundstage and further any above neutral bass starts to very fast drown details like foot steps.
Big soundstage open headphones can even have good bass without it drowning details badly.
With cheap closed garbages these are like having head in some bucket, with some sounds only being more muffled than others.
While with good open headphones sounds literally feel coming from all directions and different distances.
https://www.youtube.com/watch?v=d1_20T8x_OI
https://www.youtube.com/watch?v=B8xZp0WPwxs
