New headset.

So, my Mom got me this headset, that was suggested to her by a store owner, it's called the Roccat Kave 5.1.
It costed around $100, which is 370 shekels. What do you suggest, this or the Siberia or the G35?
http://en.ksp.co.il/...ce=0&maxprice=0
if you can tell me the best in around the 400-500 shekels (&#8362.
Thanks in advance!
I heard it's real 5.1, are the Siberia V2's and the G35 real? Heard they are driven by software.
Do I need a sound card to hear the real 5.1 in the Roccat? or is the Z77 D3H's fine?

 

OK, so I kept the Roccat Kave, heard great things about them!
Just a question, when I plug them in, and put the green 3.5mm cable (audio one), and turn the front speakers up, I can hear some noise like errrrrrrrrrrrrrrrrrrr ,,, when I turn down the front speakers, it goes away, when I plug headphones out, it goes away.