Hi - could anyone offer me some advice on buying a PC. My current desktop has seen better days. I'm not sure what deals are best. I need a PC that will be quick - I mainly use it for the internet and download films (though this is mainly done overnight). I'd rather not spend too much - the max I could afford to go to is £500 but if I can spend less, all the better! I'm not clued up when it comes to buying PCs so all the help I can get will be much appreciated.