Yeah you aren't going to find a better overclocking cpu for gaming. I've had my 2500k for over 3 yrs running 5.0ghz on air, hooked up to 2x Evga 670 GTX FTW Sli'ed and have had 0 problems. I came across a great versus benchmark/comparison of the 2500k vs the 4670k.
Turns out the 2500k is still the better cpu to own, power usage goes through the roof on the 4670k when you overclock it from stock to 4.5ghz(47% increase in power usage) Whereas the 2500k uses only an additional 9% to reach 4.5ghz-
"What's quite interesting to see is how the wattage of our test system increased while maintaining 4.5 GHz stably. The 2500K needed 9.4 percent more power and in case of the 4670K the increase was a whopping 47 percent. We were really surprised to see that overclocking the 2500K by more than 30 percent only accounted for a 9.3 percent increase in power consumption of our testsystem. Such a low number is very unusual".
Here's the review-
http://www.ocaholic.ch/modules/smartsection/item.php?itemid=1129&page=14
"Should you be thinking about replacing your Core i5-2500K setup with a Core i5-4670K, we can tell you that this step can be skipped. Since power consumption doesn't go through the roof we would highly recommend to overclock your i5-2500K and live for another one or two years with a slightly higher power consumption".
As homeles has noted, this is a thread that has been dead for nearly a year. Your input is appreciated, but we ask that users not unnecessarily resurrect old threads
-Thanks
ViRGE