He can always add a cooler later when he decides to overclock, but there no good reason to buy a K series Intel cpu if your not going to buy a mobo that supports it.
i have read you can easily get to 3.9 - 4 with the stock cooler? .. I may be wrong? I plan on doing small OC'ing soon .. and major OC'ing later on... I just didnt want to get the non k version now and have to re-build in a year.
So as of now I would like to get a MOBO that would be able to support OC'ing ..