Reliable and safe websites to Buy a Xbox 360 from

Please forgive me for asking,but i'm just wondering what are some Reliable and safe websites to Buy and Purchase a Xbox 360 from? (That you have also purchased from before) And prefeably some Reliable and Safe websites that have a Money back guaranteed refund option (Incase something goes wrong)

And also is it completely necessary that i have and get a warranty for a Xbox 360 from Microsoft?

Thank you and God Bless

x360s are all rigged to die from red light of doom after like a 1-3yrs warranty is needed.

if you want a site try amazon, play.com, game shop sites etc.