Microsoft has just a awesome pre-order deal on the the Microsoft Store, if you pre-order GTA 5, you get a coupon code to get 1600 ms points and with the Xbox live currency update earlier this week, it converts to about 20$ in Microsoft money that you can use to get GTA 5 DLC.
Grand Theft Auto 5 is set to launch on Xbox 360 and PS3 on September 17