Thx for your suggestion @2Be_or_Not2Be
But wot about above said config.
Asus M5A78L-M/USB (mobo)
Ati Radeon r7 240 with boost 1gb ddr5 (gpu)
The Pentium G3258 balances price with performance for what you said you could spend. You have no memory with your AMD setup. Also, that R7 240 graphics card is quite a bit lower in performance than a GTX 750. Look here
on Tom's July 2014 review to see how much lower on the performance chart that R7 240 goes.