I would agree with Andy's advice, but you can get the Q Acoustic speakers for £450, so the denon 1909 (£450) might be a good option too. Be warned: The Yamaha amp only has 2 HDMI inputs so be aware not to run out if you choose that amp.(Onkyo has 4, and denon has 3)
The denon might be the best compromise ,though, especially if your using it for music too, and need a 1080p upscaler.
That would leave you with the £100 Andy mentioned for cables etc.
Hope that helps....