We all know the Xbox 360 Premium has now been reduced by £30, reducing it to just £249.99 but now I believe this to be the best bundle so far, which offers you an extra 4 games and an additional wireless controller for just an extra £35, which is worth at least a £100.
The package includes:
Xbox 360 Premium Console (includes wireless controller, 20gb harddrive, headset etc)
Gears of War
Extra Official Wireless Controller
Hope this helps. :)