I agree with mostly what Golden said, I'd go AMD/ATI myself for processor and video card. If you already have a case, CD drive, kb/mouse to reuse, you can get the rest for rather cheap. 161 for Mobo/Processor combo, 128 for video card, 65 for PSU....those prices are in pounds. If you need to buy the other stuff, it'll cost a couple hundred, but you'll still be able to keep it 450 or under