super street fighter 4 arcade edition dlc arcade challengers pack, 2 new outfits for each character, yun, yang, oni and evil ryu, 320 microsoft points,
copyright capcom and overclocked remix for the audio, check out the street fighter hd remix soundtrack at

http://ocremix.org/info/OC_ReMix:_Super_Street_Fighter_II_Turbo_HD_Remix_Official_Soundtrack

Thanks to bigmacthecaveman for pointing out to me that you could dl these from the game disc as they were not showing up on xbox live.