I am not sure what I need so I am hoping that someone can help me out. I am looking to buy an XBOX 360. Walmart has one, as well as gamestop, for $199.99 that is the XBox 360 Arcarde. I want to be able to get one XBOX live so that I can play with friends. I will need to get the wireless netword adapter, but other than that what else do I need to get in order to use XBOX live? Do I have to get the memory card right away?