Buying new Video Card, need help with power supply recommendations

Recently i've decided to buy a new video card and have chosen the Sapphire 280x seen
here

The problem is that the video card needs 750w and I currently only have 500w forcing me to buy a new power supply. I have no experience at all with power supplies and could use some help ensuring the power supply will do the job I need it to do.

Currently my specs are:

CPU: AMD FX-8120 Eight-Core Processor (8 CPUs), ~3.1ghz

Motherboard: Gigabyte GA-970A-D3

Video Card: AMD Radeon HD 7700 Series

Case: Cooler Master CM 690 II Advanced (USB 3)

Operating System: Windows 8 64-bit

I plan to run my current video card as a second card allowing for dual monitors which is another thing I have to take into account when buying the power supply.

I'm trying to find the cheapest power supply that will do the job without sacrificing a huge ammount of quality, currently i'm looking at this one I just need to know that it will work before purchasing.

Thank you in advance for the help :)
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More about buying video card power supply recommendations
  1. this one will do the job : http://pcpartpicker.com/part/antec-power-supply-hcg620m
    made by seasonic with 48A on 12V rail and modular cables for a good price...
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