PSU Requirement for rig

Adder7i7i

Honorable
Apr 17, 2013
18
0
10,510
I want to know the PSU requirement needed to stably run this rig. Specifications:
i7 4770k 3.5GHz
MSI Z87 G43
8 GB Corsair Vegeance 1600 MHz
NZXT Lexa S
Radeon R9 280x -forgot to mention it earlier
Responses will be appreciated :)
 

Adder7i7i

Honorable
Apr 17, 2013
18
0
10,510


My budget is about a hundred US dollars. That's why looking for the lowest possible, but shall not be a gamble.
 

Adder7i7i

Honorable
Apr 17, 2013
18
0
10,510
I appreciate your recommendations. But this is only available in the US. I, here at India, am only accessible to brands available on www.ebay.in. If you have time, please go through it to suggest me one. The well renowned brands have a really high prices for 750 watts. FYI: Rs. 6,200 = 100 USD