To have a surround sound in games you need to look for Siberia V2 USB version (with included sound card), the normal version use 3,5mm jack. With 3,5mm jack you need to have a proper sound card which will emulate surround sound.
Siberia V2 USB (with included USB sound card) cost +- 750dkk.
With Corsair 1500 for 499dkk (komplett discount) you get USB sound card, so you don`t need a proper sound card to have surround sound in games.
You can also take a look @ Corsair HS1:
http://www.edbpriser.dk[...]
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P183 V3 @ 600rpm, P8P67 Deluxe, i7-2600K @ 4GHz, NH-D14 @ 600rpm, C300 128GB, 4GB 1600/7, AX850, GTX 580 + Alpenföhn Peter @ 500rpm ... 2 x BenQ 120Hz