Which Game Should I get??10PTS!!!!?

Once again I have just finished my last game and I need something to hold me over until NCAA 12 next month lol I have narrowed my choices down to Shift 2 unleashed, Fallout New Vegas, and Fable 3 I played the first Shift game and I really like it and I played Gran Turismo 5 and that was an awesome game to, so how does Shift 2 compare to those games? I also played Fallout 3 and that was to an awesome game but I thought it was extremely long and difficult at certain points in the game so I think New Vegas will be the same, I have never played any of the Fable games but I did play the Fable 3 demo and I thought it was pretty fun but anyone who has played it I would like your opinion on it. So those are my choices and if you think there is something out there way better then these games feel free to offer your opinion, FYI I have all the call of Duty games and Battlefield games and all the GTA's and Red Dead Redemption and alot of racing games, just to give you an idea of what I normally play. Your opinion is much appreciated and I will give 10PTS to the most informative answer.