Check the system requirements when they come out. I'm guessing you have to spend around $100-150 if you want a graphics card rha can handle 2K12.
It's not too expensive. I live in Sweden and I spent around $180 for a card that can run NBA 2K11 smoothly on everything maxed out. In Sweden that's not too expensive, don't know if that's alot in the US though.
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I am here:
http://maps.google.com/maps?ll=59.316914,18.045891