I would hang fire mate! PES09 is out on 17/10/08.
But if you can't wait then you'll have to buy a card with pixel shader 3.0 to enjoy excellent graphics and I'm not too sure you'll get a PCI card that will handle pixel shader 3.0?
No point in blowing money if the card you've got will run it in the meantime?
Digicol would know better