Where to get windows 7

[testinglife]

Hey i'm building a gaming Desktop and need an OS which i decided to get windows 7. Is the basic home premium a good choice ? Is there any benefit in upgrading ? Can you guys link me some places to get them cheap ? thanks

 

[Dark Lord of Tech]

http://www.newegg.com/Product/Product.aspx?Item=N82E16832116986

Here ^