He's right though, I know better then a lot of people how much of a waste it is to run 650+ with a single card. Let alone 850w. I've recommended more then what's absolutely needed on more then one occasion.
What we need is a complete list of what will be ran. Fans, motherboard, HDD's, GPU(s), CPU(s), etc. Because most of the time a certain unit will run a setup just fine, but it will lack the necessary number of connectors. Or a unit that seems perfect, but doesn't have enough amperage on the 12v rail. More information is needed to make an informed recommendation.