That is not an overly hot CPU - so any solid after market heatsink/fan should suffice. Remember to clean the previous thermal paste and use a good paste when making this change. You can research this topic - there are a ton of threads.
As for the GTX 760, there are also after market cooling solutions for these as well. Same rules apply for thermal paste.
if you wish to go crazy - you may want to consider liquid cooling - many people have had really good success with this - and it allows for some significant over clocking if you want to go in that direction. Many threads on liquid cooling abound as well.
Also - give a good look at your case cooling and airflow.