Thanks to Asasdasasd for starting this poll! We've contacted the vendor on your behalf and they've made the Creative Sound Blaster ZxR Sound Card available.
It's not so much about the DAC / AMP - in which case we all know dedicated gear will sound better.
It's for getting proper surround sound in games which adds a lot to immersion and enjoyment. The DACs on those cards are more than sufficient for that. Of course the best setup would be: sound card (surround processing) -> DAC -> AMP -> headphones. Purely from a gaming perspective of course.
What Helikaon said. My SB x-Fi Titanium HD feeds my SMSL sd793II via optical then goes to my old vintage Yamaha. Upgrading to an SMSL M8 through a drop now but I'm sure I'll still be using the sound processing available to me with my soundcard.