This has been posted before but has dropped in price and now has more options.
You can get for £135.99:
Xbox 360 Slim 4GB
Forza Motorsport 3
2m HDMI Cable
And if you like you can add one of the following new releases for £20 (£155.99 total):
Medal of Honour - Limited Edition
Post 2 has a few frequent questions and answers.