At the current time i would recommend nothing, wait until the Radeon HD 8000 series or the GTX 700 series come out, you might feel really cheated if a 8950 comes out that rinses the 7950 and costs the same, or likewise with nvidia. Your rig is currently good enough for gaming on the your resolution at max settings, if your card runs to hot or you feel like it is louder than it should be contact the card provider to see about getting a replacement if you are still under warranty.Kind regards,
Jake.