What Gpu should I get?

I want a $200 - $275 graphics card and im not sure witch one best serves my needs.  I am mostly gaming so i was thinking 7950 but I am going to be doing a good amount of autoddesk inventor and just a little bit of photoshopping but not to much photoshopping. 

Ps i have 8gb of ddr3 1600 and a phenom ii x4 955

go with the hd 7950 becajse im pretty sure thats the best ur cpu can handle

because*