That PSU is plenty and some for your build! You probably could run 2 xHD6770 in CF on that PSU if your board supported it.
Wow really? That's pretty awesome. I don't actually ever plan on using 2 video cards (for what I do it'd probably be a waste lol), but I do plan on adding an additional hard drive at a later time for mass storage so that's good to know. Thank you very much!