[iCyberShot]

Have a laptop for almost 2 years with i3 1st generation processor and a crappy Realtek HD audio sound card. What improvement should i do now in order to get full performance 5.1 or 7.1 surround sound from (for example: tritton ax pro) headset? Im just a normal guy who is addict to only music and movies but not gaming, which headset you suggest the most?? MIght be needing a budget wise headset (usd 100-200). After doing some research, i am still quite confuse what item to buy first before buying a headset? A Steelseries siberia virtual 7.1 usb sound card or just find a headset which use usb to connect but not 3.5mm jack or even a Creative Sound Blaster X-Fi HD Sound Card? 
 
Edit: Need 1 more THX certified criteria in the headset.