If you don't want to play any games at all, you can easily cut back on the graphics card. Something like an ATI HD2400 is under £40 and it'll do HD decoding on board, taking load off the CPU, and being more efficient, whilst probably being quieter than a normal card like the one tomturd suggested. But it'll be rubbish for games, so them's the breaks. Oh, and definitely factor in a nice big screen