Thanks to a member here I now know for sure that the cpu will be a 2500k or 2600k. I am going to overclock probably around 4gHz or so. Would I need a cooler fro it or would the stock cooler be ok.
I would advise against using the stock cooler although it may be possible to use it at 4 ghz. My i7 2600K is running fine @ 4.5 ghz on a $30 Cooler Master Hyper 212+ cooler
Intel is still packaging the same junk HSFs that they have been for years
I believe the stock cooler will be able to handle 4ghz just fine. This will most likely still be at stock voltages, since it's only about a 20% overclock from stock.
Plus the guy at anandtech got to 4.4ghz on the stock cooler.