2500k would work great. Though, if you haven't got it yet, you should pick up i5-3570k instead, as it's around 5% faster and costs the same.
Of course, if you already have the 2500k, it will work just fine without any bottlenecks whatsoever.
And I'd advice at least 700 watt power supply unit with 4 6-pin PCIe connectors. Get a quality unit from either Corsair, Antec, Seasonic or XFX.