Today only, you can get a 660-Watt SeaSonic SS-660XP
for $109 and free shipping, with a MIR for a further $20 off. Promo code EMCYTZT3071
If I was getting a PSU today, that's what I would get.
Core i7 4790k 4.5GHz Vcore 1.21v, HT enabled; Gigabyte GA-Z97X Gaming 7, f6
2x4GB Crucial Ballistix UltraLow Profile DDR3-1600 9-9-9-24@1600MHz Vdimm 1.35v
Intel 4600 graphics using 1GB system memory; Megahalems with Prolimatech Blue Vortex 14
Samsung 840 EVO 500GB SSD; Seasonic X-460FL (fanless); Basement open air testing rig