We know that the new Xbox 360 spring update will see the introduction of an update disc format, but before you are able to get your hands on such an update, you would definitely need to own an Xbox 360 in the first place, right? For those who want to turn the tide against the PS3, join the Xbox 360 brigade by picking a 4GB model up from Amazon. After all, the online retailer is offering said console with a $50 credit after you drop $199 for it, and this credit isn’t just restricted to games but can also be used to pick up other merchandise on Amazon. Any takers?