PSU Wattage Help

What power supply wattage would you recommend for the following configuration?

AMD FX 6300 @ 4.4 Ghz / 1.45 Volts

Asus M5A97 R2.0 Motherboard

Ram: 4x 4GB Dimms of any RAM I will get as soon as I can afford, probably corsair, I like corsair.

GPU: Going to get either a GTX 760 or 7870.

4 x Corsair AF-120mm LED Fans

Corsair H100 + 2 x Corsair SP-120mm Fans

Samsung 840 SSD

WD Caviar Black HDD

5.1 Startech Sound Card

DVD Burner

Mulit Card Reader

NZXT Sentry 2 Fan Controller

I was thinking 500W as an absolute minimum. Is that about right or am I completely wrong? Thanks for any advice

Get a 650 Corsair PSU and call it a day.

500W would power that. I'd recommend the XFX 550W. Just because it will allow you to stress your system, gives headroom for future GPUs, and the unit is cheap and good quality.