ojasmm :
Which r9 280x should I get and what power supply, I have a intel i7 3770 and 12 gb ddr3 ram. Plus is this gpu future proof?
The R9 280x is a slightly better option than the GTX 960 in my opinion with the extra GB of VRAM, I have a GTX 760 and I can play most games at high settings, decent framerates so yes. For your price range, the 280x would be a decent choice.
You may need a 550w 80+ Bronze for a PSU to be 'sufficient' anything more than that is perfect!
*edit*
Some forums are saying a minimum of a 600w PSU, but that is for a AMD CPU build which does consume more power than Intel CPU's.