please please please don't buy from PC world. Whatever they sell can't be called a proper PC...

I've used cyberpowersystem.co.uk a few times and they are great - you can buy a PC with all you need for £800 excl monitor/mouse/keyboard, or £900 quid max with.

Look at the weekly sales III pack and ensure you choose I5 as processor rather than I7.Look for configurator 457363 which I've saved.