being honest if your 250 is still running the game well right now i would offer one piece of advice. stay with it for just a bit and wait for a short time before upgrading. with the 600 series cards out the price on the 500 series cards will start dropping the closer we get to the holidays. i have the 580 cod factory overclocked edition and this card is a complete beast.

i guess it's more of why spend the amount now for a card when you could get a much better card for the same amount of cash in just a few months? if it's running fine now just hold off on the upgrade because the game will be going down soon for beta anyways and may as well get a better card for the same amount you will be spending now while it's down and be ready to put it to use once it comes back up.