as i live by, never skimp on a PSU... which i apply by never buying one under $50 being the absolute minimum.. and only being for like a single core underpowered office computer.
Ever noticed most office computers (celly and integrated graphics) power supply's last 3-4 years? most power supply's outlive the computer. Their are applications where you need to spend on a power supply, but some where you don't.
And may i remind most to all of power supply's manufactured under the deer name explode anyway?