what is the max power draw of that CPU?
I don't know, but articles Wikipedia shows that i7-2600 will be @ 95W TDP.
The Sandy Bridge isn't in the list yet. Thanks.
600w corsair or seasonic will be fine. According to matto17secs link, the system might draw 400w at peak load (probably artificially reached by furmark), and thats power from the wall. Assuming the psu is 80% efficient at converting power at the wall to DCV thats 320-350w the system is drawing from the PSU. So 600w is more than you need, and more is good so your not stressing the psu out too much and leaves room for upgrades.
Here is Guru3D's power supply recommendation:
From the article
GeForce GTX 470
* On your average system the card requires you to have a 550~600 Watt power supply unit.
Thx. About GTX 470, I'm just afraid the 470 will be a sucker when it comes to power.