I have a Beyerdynamic mmx300 which im told is really a dt770(32 ohm) with a mic. I've recently purchased a xonar essence st to power it. Is my sound card good enough to use this headset to its fullest potential?

I just came upon some cash, I was wondering if some of you could help recommend a headset to take over the role of my beyerdynamic mmx 300's.   Also the soundcard I'm using http://www.amazon.com/Xonar-Essence-24-bit-192KHz-Interface/dp/B002UVME88