Im buying a xbox 360 but i have questions. I own a wireless router and have wi-fi, but do i need to still buy the adapter to play online? Also, what are the differences between the different live memberships. The gold and silver ones? And also, do all of the new units have the falcon chip thing to reduce the infamous red ring of death? And one more thing, is the only difference between the elite and the pro the memory and the hdmi cords? Thanks for helping in advance! And remember hurry!