I might suggest a EVGA GTX760 superclocked with a reference coolerhttp://www.newegg.com/Product/Product.aspx?Item=N82E16814130934
With the factory overclock, you get a better chip and no real need for overclocking.
With the direct exhaust blower cooler,
They get the hot vga air directly out the back of the case.
Other aftermarket coolers do a good job of cooling the vga chip in an open testbed.
But in a case, they just dump ht air back into the case where case cooling has to deal with it.
That heats up both the graphics card AND the cpu.