You're looking at a build very similar to one I just put together at the weekend. I'm assuming this is a for a gaming machine, given the spec?
Your PSU might be a little low in power if you're running that graphics card and want to overclock. Try something in the 750w range - also, you pay for the Corsair brand, try XFX, virtually the same.
8GB RAM is probably a bit excessive, 4GB is fine for games right now and you can upgrade at a later date if you need to. Ripjaws are good though, and 1600MHz is fine if you plan to OC.
I've not used the Corsair heatsink you're talking about, but I installed a CM Hyper-212 with a push-pull setup - works great, and is pretty cheap. It gets great reviews, but it might not do you up to 4.7GHz. But first, you probably want to make sure your system gets there and is stable - you can always upgrade your heatsink later and the Hyper-212 is cheap enough to justify being an interim component.
I went with the MSI TwinFrozr2 560 Ti...no regrets, great card, but there are equally compelling arguments for the 6950. I have read that the newer 6950s can't
be reflashed to become 6970s, so bear that in mind / do some more research before committing the cash.
The case you look at is one I nearly got. I'd look at getting one with the mesh side panel as you may have some heating issues with the Graphite 600T. It's pricier, but I went with the Obsidian 700D, which was Â£35 more than the 600T. If you cut back on the RAM and get a cheaper heatsink, you could get a much bigger case which is an absolute joy to work in. Plus it's got plenty of potential for water-cooling that hot, OCd CPU of yours.
Lastly, I got the Asus P8P67-Pro. Not sure if it would be better / worse than the mobo you have selected, but I do know for a fact it fits with the Hyper-212 and all RAM slots are accessible.
Have fun...whatever you pick, you've got a good build lined up.