Well, I am actually helping a friend. I think he will use it mostly for gaming. Not sure about work wise though, but probably isn't too heavy on the PC.
The parts were chosen by him and I just thought it would be good to run by here and ask some experts.
I made a mistake above, the cpu he wanted is i7-4790.
There isn't a need for a monitor and OS, he won't be doing any overclocking either.
I am not really sure budget wise, we are getting from this site http://www.mynextcomonline.com/
it is all in Sing dollars. A rough guess would be around 2000-2500SGD.