If you want to back up 360 games, then you will need a DVD drive that supports bit setting (depending if you have Hitachi or Samsung) and it will also need to support DVD+R DL. But as Arakon said, the Pioneer 111D drives are very cheap (to be exact $40 over in Australia) ;0
gigbaite
Not sure if Bitsetting is still required for Samsung but not for Hitachi..