Need to find a good PSU for future GFX upgrades!

[killerloader]

I need to find a good PSU that will work in my computer, and should be able to handle future graphic cards, so i was thinking probably 750-900w

Here's the computer i have:
Link

At the moment i have a 'AMD radeon 270x' gfx with a 500w power supply, it works, although it can't be overclocked without getting the BSOD.

I have never upgraded a PSU before, so i don't know what i have to look for to make sure that it works and fits inside my computer, could someone give me a suggestion of a good, cheap (around $150-200 probably) PSU that would fit my computer and work for future gfx upgrades (For example, GTX 780 ti)

 

[nostall]

This should be enough for one 780Ti. If you plan on SLI with two 780Ti's you will need in the neighborhood of 1000watts.
http://au.pcpartpicker.com/part/xfx-power-supply-p1750bbefx

 

[Dark Lord of Tech]

SEASONIC MADE

PCPartPicker part list / Price breakdown by merchant / Benchmarks

Power Supply: Antec HCG M 750W 80+ Bronze Certified Semi-Modular ATX Power Supply ($165.00 @ CPL Online)
Total: $165.00
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-05-03 14:02 EST+1000)