New build, power supply

SeismicAltop

Honorable
Mar 21, 2013
128
0
10,710
Here's the build:
-GA-Z77X-UD3H
-XMS3 Series 8GB DDR3-1600
-Cooler master hyper 212
-i5-3570k
-Seagate 500gb + 160gb:
-NZXT M59
-Power supply?
-NZXT M59
I figured $820 for the lot, but I need a modular 500 watt supply. Also any other recommendations for HDDs would be nice.