ok if i get the 4770k and dont decide to overclock it would it be ok to use stock cooler on 4770k for now?.
The OP said they can get the 4790 for 50 pounds cheaper than the 4770k and that they're not planning to overclock.4770K is much cheaper instead and the difference in performance is marginal.
Overclocked 4770K will be always much faster than 4790 non-K.