Either a GTX 780 or a R9 290. And for the sake of simplicity, they both have stock coolers.
My friend said he'd rather go with an R9 290. I think he's wrong.
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Edited by Uncle Putin: 1/20/2014 9:06:47 PMNvidia always. The Raedon has generally better specs but those specs are idealistic and under only extreme optimal conditions (like overclocking). The 780 has better benchmarks so I would go with that.