My bro is coming back from USA for Xmas and I would like him to bring back either a PSP or Ds Lite as I hear they are much cheaper there.My only prob is which one?I like that Brain Training game for the DS but are the other games too "childish".Whereas the PSP seems to have more games like the FIFA's and Grand Theft Auto games plus Mp3 which I dont have.Does the PSP have a brain training type game?