im probably going to play dark souls 2 and battlefield 4, will it be able to handle max settings at stable fps or at least high settings at stable fps. Will the cpu fan be able to take som overclocking of the cpu?
That cpu cooler would be better than the stock cooler, but not really ideal for overclocking. If you want a medium overclock, look to the cooler master Hyper 212 evo. If you want an aggressive overclock, look to the Noctua NH-D14 or NH-D15.
What CPU are you looking at?
What resolution is your monitor?
Personally, I'd seriously consider waiting if I was building a new computer today. I think I'd wait for the new 800 series GPU to come out. I haven't heard the latest on when they are due, but last I heard was October. Something to think about.