Since the power supply failure of my Corsair AX850, I've decided to fit in a new Heat sink for the cpu since I was going to fit in a new replacement psu. Not that the current stock heat-sink for the i5-2500k was any bad at all, it was actually quite decent.
During the initial part of picking components for the whole setup, I was actually contemplating of getting the Xigmatek Dark Knight Cooler. I decided not to get it at first because of not really needing it at that particular moment. Regretfully, 5 months later the Xigmatek was already bought by someone else and there was no stock available.
I was considering between the Xigmatek Dark Knight and Cooler Master Hyper 212+. Unfortunately no one seems to be selling the 212+ in my area. So in the end I was left to choose ( again ) from what was available during the time. It was the Cooler Master Hyper 212 Evo.