This one here http://pcpartpicker.com/b/HMgLrH
can probably get similar framerates to the new consoles. The 750ti is an average card, low power consumption and the total only comes to $590. With the extra cash you could get another 4GB stick of RAM which you will eventually need, or you could save for a slightly beefier GPU for a little extra money, but then a PSU upgrade would be in order.