Need help in choosing headset

New headsets from plantronics. I like the design.
I tried 370/770 and in game was lets say good but music was terrible.
2 new ones:
http://www.plantronics.com/north_america/en_US/products/computer/pc-gaming-headsets/gamecom-377

http://www.plantronics.com/north_america/en_US/products/computer/pc-gaming-headsets/gamecom-777

There is 3rd model with closed ear design but im not interested.
The thing is that 777 has usb connection and they say that it has a:
Dolby� Headphone Technology delivers a 5-channel audio experience. Dolby� USB sound card is the only way to get the 5.1 experience. If needed, an analog connection is also provided.
Is it just some new trick like in 370/770 with no difference then usb sound card or is 777 worth buying it?
Has anybody this things around here?
Sorry for bad english :unsure:
if anybody has some other better headset for that kind of money please say
Answer #1
anybody?
Answer #2
bump
Answer #3
cmon
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glenny.