Here are a few PSUs I would consider:
http://uk.pcpartpicker.com/parts/compare/seasonic-power-supply-ss620gm2%2Cxfx-power-supply-p1550sxxb9%2Cxfx-power-supply-p1650xxxb9/
Includes a non modular, semi modular, and fully modular PSU, the cheapest being non modular.