Enough power for Quadfire

I was just wondering if a Silverstone DA-1000w PSU is enough to power this new system I am ordering parts for a build for a friend---Mobo is the Asus CrosshairIV Extreme<>RAM--G Skill Flare 2x4gb DDR3 2000<>GPU--XFX BLACK 5970 4gb(2 of these for Quadfire will overclock high)<>CPU--AMD Phenom ll X6 1090t(will overclock over 4.0)<>Hard Drive--External 2tb WD My Book (usb 3.0),Wd Caviar Black 1tb7,200 RPM,1 WD V-raptor 10,000RPM(boot drive+games)<>Cooler--Corsair H70<>1 blu ray combo drive,1 dvd drive<>Asus Xonar soundcard<>2 extra case fans (low RPM)..............I was hoping this would be a large enough PSU ,since I will be overclocking a decent amount on this build I am not really sure.I wanted to make sure I have enough headroom though.My other choice is the Corsair 1200w AX Pro Series.