Everyone needs Quad SLI PC Power & Cooling 1Kw power supplies! ahhh! </sarcasm>
On a more serious note, nothing's really been confirmed, and I don't know what other components you may be running now or in the future, but if you wanted to be sure, I'd suggest the newest PCP&C power supply, 610W, 83% efficiency, dual PCI-E connectors, at a decent price, $169 at newegg, last I checked.