Since you havent finalized on the components maybe you should check out the below build:-
Processor:-Intel Core i7-4770K Processor 3.4 GHz
Motherboard:-ASUS Sabertooth Z87
Memory:-Corsair Vengeance 8GB (2×4GB) DDR3 1600 MHz
Graphics Card:-EVGA Nvidia GTX 780-3GB DDR5
Power Supply:-Any good brand above 650 watts
These components are easy to get, not costly also it would be a beast. I am using this build and believe me it runs smooth on all games.