What headset out of these?

I searched for some budget gaming headsets on ebay and this is what I found:
Logitech G430: http://www.ebay.com/itm/181312070152?ssPageName=STRK:ME...
Steelseries Siberia V2: http://www.ebay.com/itm/161378697834?var=460400360550&s...
Turtle Beach Ear Force X12: http://www.ebay.com/itm/321388611714?ssPageName=STRK:ME...
Plantronics Gamecom 780: http://www.ebay.com/itm/141380724137?ssPageName=STRK:ME...
Plantronics Gamecom 380: http://www.ebay.com/itm/261560157031?ssPageName=STRK:ME...
Which one do you think is the best?
Personally,I like everyone of them,but I don't like the looks of the Siberia V2.But if they're worth the price and if they're a great pair of headsets,I will be getting those then.
I also have a couple of questions:
1. Are they all circumaural?
2. Are they all for PC?
3. Are they good for gaming?
Thanks in advance for the answers. :)
 
Alright I am back. I am not sure if you read the link I provided but it reviews the headset and categorises according to budget.

1. From what I can see inthe image they all are circumaural and should cover your ears. But maybe not the Turtle Beach and SteelSeries.
2. According to my research over the internet, they all are for PC and compatible. And TurtleBeach can be used for Xbox.
3.Yes they are all gaming and if you read my link it is useful.
 


That's where I was looking for them. ;)
 


is surround sound good for gaming?
Cuz if it is,then I will get the G430 or the Gamecom 780.
 


Check this out. :)
http://www.tomshardware.com/reviews/surround-sound-headset-benchmark,3125.html
 


So I'm guessing that it's pretty useful.
But it's so hard to choose between the G430 and the Plantronics 780...The price difference is like $15 (G430 are cheaper)but even then it's super hard..I don't know which one to get..