And im not so sure about this but you might want to get a psu that is SLI certified instead of Crossfire certified. SLI and Crossfire are both for video card which lets you connect 2+ video cards of the same type and run them at the same time through one monitor. Basicly if you run dual Fermi's in SLI you will get twice the preformance compared to running a single Fermi. But Crossfire is for ATI while SLI is for nividia. It won't make a diffrence for using just one card but if you ever decide to run SLI it would be better if the psu was certified for SLI use.
But generally speaking you don't want a psu that looks stylish. You want a psu that is reliable. Although it might be a good psu i would recommend getting a psu that has 200+ reviews.
In this case i would recommend this one.
http://www.newegg.com/Product/Product.aspx?Item=17-139-005&SortField=0&SummaryType=0&Pagesize=10&PurchaseMark=&SelectedRating=3&VideoOnlyMark=False&VendorMark=&IsFeedbackTab=true&Keywords=%28keywords%29&Page=1
Before i forget what do you plan to construct the case out of and what do you plan on making it look like?
Sorry to be blunt, but you're totally wrong. You don't need an SLI certified PSU. That basically means that they've paid off Nvidia for a extra feature-point. Aside from the fact that the OP is 1. not going to need an SLI setup if they're going with a 470 and 2. not going to be able to run SLI 470s off a 650W as it is, they don't need SLI certification to run an SLI setup. Especially if the PSU is still certified for Crossfire, then a SLI certification means sweet FA. That said, you're quite right in saying that's a great PSU (the Corsair). It's not perfect (fluctuation under really high load, but that's why we've got the wattage headroom in the first place), but it's definitely good enough.
The others are right, though. A 470 might be overkill. I spend quite a lot of time on my computer and I use a single 5770, which is probably 60% of power 470. That said, I'd quite like the power of a 470, as it would allow me that extra juice to up the settings at 1920x1080.
You guys need to remember that he's gaming on a full HD monitor, so it will require a lot more power than running at 1440x900. This card will also last a lot longer than a slower card, so it may even out in the long run. If you can afford it, I'd say go for it. Alternatively, if you want to draw out the cost a little more, you could go with a cheap, EOL card, such as the 9800GTX+ until such time as you feel the need to upgrade, although you could probably shave part of the difference off other things first. (PSU, Mobo, Screen)
Before you finalise things, have you considered mouse and keyboard? They make a hell of a difference in the end experience and I'm willing to bet that you could do better than what you have in that department.