Even if you bought the full Xbox 360 system complete with all the goodies, you'll likely need a few accessories to round out your next generation console. You're going to need some controllers for those friends of yours. After all, what fun is it to play alone? While you're at it, you might as well grab a few extra battery packs, and a headset that you don't have to duct tape to your ear.
Check out Gamespot's Rundown to get the lowdown on all the goods for the Xbox 360. You're sure to find something you need or want.