If he's not overclocking and is sticking with one GPU that will be fine. Performance is relative - e.g. that combination would be fine for 3D Vision + very big monitor but only playing GPU-bound games, not that a 2600k at default speeds is a bottleneck for anything yet.
He'd obviously get better results with a P67 or Z68 to OC the 2600k.
Hardware Canucks is focused in-depth reviews of the the latest graphics cards, CPUs, storage, smartphones, notebooks and gaming peripherals. Join us as we unbox, review and benchmark the best computer hardware on the market.