Please get a 7850. For your sake, for my mental health, please do it. I don't know why anyone is suggesting a low-end Nvidia card over a 7850; low-end Nvidia falls on the wrong side of the value curve, whereas the 7850 maximizes the value function.
Because if he's not overclocking, the factory overclocked EVGA GTX 650 ti (1071mhz) at $180 or a mildly factory overclocked GTX 650 ti's (980mhzish core) at around $160 will outperform a stock clocked 7850 priced at $170-180???
the only question is if he's ever going to overclock or pony up the extra $10+($195+) for the factory oced 7850......