We need to know if you want to crossfire in the future and your budget:
Here are some PSUs in the general range (the site has even more) from Corsair and SeaSonic @ the website the OP gave . Keep in mind he is OCing both GPU and CPU.
SeaSonics:
S12II-520 : $ 90 (NIS 345)
M12II-520 (Modular) : $104 (NIS 400)
S12II-620 620W 80+ Bronze : $98 (NIS 375)
M12II-620 620W Modular 80+ Bronze (Modular) : $115 (NIS 440)
M12D-750 750W Modular 80+ Silver (Modular) : $177 (NIS 680)
SS-850HT 850W 80+ (non-modular and over kill, but... cheaper than the M12D-750w) : $169 (NIS 650)
Corsair:
VX 550W : $126 (NIS 485)
TX 650W : $148 (NIS 570)
TX 750W : $177 (NIS 680)
HX 650W (Modular) : $182 (NIS 700)