well assuming your numbers are right that is 595 + hdd & other hardware not listed. lets assume your number is around 650-700w.
an 800w psu will probably run it fine but its always better to have more leadway. if anything i would think you wouldnt have enough connectors.
keep in mind that idle and load require different amounts of power. i would suggest to be at least 20% greater than your max load. personally i prefer at least 150-200w headroom for peace of mind.
my i7/470gtx idles at around 330w. i've seen it go up as high as 400-450w during crysis but if i tested it harder i would expect a larger power draw. i use a 1000w psu because it provides the plugs i need and provides room for future sli.