Cheap Core i5 Build and a PSU question

Hello,
I'm about to build a PC for the first time, but I have one doubt about what PSU I should buy. If you guys don't mind I'll use the New System Build guide to tell you the parts I'm thinking of buying.

APPROXIMATE PURCHASE DATE: This week

BUDGET RANGE: 600-750

SYSTEM USAGE FROM MOST TO LEAST IMPORTANT: Watching movies, surfing web, gaming, listening to music

PARTS NOT REQUIRED: Keyboard, mouse, monitor, speakers, already got 2 HDD's: WD Green 1TB HD & WD 160GB 7200RPM HD

PREFERRED WEBSITE(S) FOR PARTS: newegg.com

COUNTRY OF ORIGIN: US

PARTS PREFERENCES: CPU=Intel Core i5-750
Mobo=ASRock P55 Extreme LGA 1156 Intel P55 ATX Intel Motherboard
RAM=G.SKILL Ripjaws Series 4GB (2 x 2GB) DDR3 1600 (will be upgraded to 8GB)
GPU=SPARKLE SXS2501024D3L-NM GeForce GTS 250 1GB 256-bit GDDR3
Tower=Antec TWO HUNDRED S Black ATX Mid Tower Computer Case
DVD=LG DVD Burner Black SATA Model GH22NS50

OVERCLOCKING: Maybe

SLI OR CROSSFIRE: Maybe in the future

MONITOR RESOLUTION: 1920x1080

Now the only thing missing is the PSU. The Antec two hundred has combo's that have two good PSU I saw. The option are:
Antec NEO ECO 620C 620W
Antec EarthWatts EA650 650W

Which should I choose? Does the 3 +12V Rails in the antec earthwatts ea650 make it better than the antec neo eco 620c? Help me choose!!

Are there any other things you would change? Please take into account I'm trying to have the cheapest i5 build possible.

Thanks