Ubrales :
The main advantage of the "K" versions is that it has an unlocked multiplier and hence overclocking is easier. In your case I don't see it economical to switch to the K version. Use it as-is.
I know this is the old thread but now intel is released the broadwell gen 5 processor.
I currently using I7-4790@3.6GHz Haswell. I wanna upgrade to gen 5 and my mobo is ASUS Z97-PRO(Wi-Fi ac)
Can u give me recommendation which is the best suit and best performance for my mobo and have overclocked option too I want overclock my mobo in the future and The price is not my consideration. TQ