What are you using the P4 for? finding aliens or encoding 10 DivX movies at a time? You dont need a 2.4ghz for playing MP3s. a P3 Tualatin 1.2ghz would be fast enough to play DVD, DivX, MP3 or anything you throw at it. Just dont encode DivX movies. It'll take you all night. Besides, it uses half the power of the P4 2.4Ghz chip.