Help with build

These are the parts that I have selected.

My questions are: would i be better suited by doubling down on the ram or would I be better suited by getting a GPU to add on. And would you suggest any different parts for this build? This build will be used for some PC gaming I'm not looking for ultra high res gaming but, something at a playable frame rate.

If I added this GPU to the build would I be able to play AAA titles on high settings?

which GPU do you think to add? 

I would go with 1866 MHz ram, if you use onboard HD 7660D then faster ram would be better.. 

What is your budget? 

My budget for the GPU would be from $100 to $200. And I was thinking either or;tab=reviews?id=1218808240495&skuId=6819866