thanks
and yeah, i wasn't planning on overclocking so modular psu would be better
here
http://pcpartpicker.com/p/2Ef90if you are willing to spend 200 more, 1350 total cost, you could get the gtx 780 ti, the most powerful gaming video card on the market
A quick check with Newegg's wattage calculator suggests you'll need more than a 600w PSU. You should probably go for a 700w.
the wattage is overestimated too much on newegg's power calculator (edit; just checked it myself and it gave me recommended amount of 550w. ok) the video card's min is 600w, my new build's psu is 650w. and even 650w is overkill in theory.
the 780, in full maximum stress (which never happens in normal conditions anways), uses 350w. the i5 should use up no more than 90w. the rest of the system, probably no more than 100w. around 550w at full stress. the reason why they overestimate the wattage is so they had no problems with idiots frying their whole system while trying to overclock their old cpus to 5ghz