z_man22 :
Upgrades :
Corsair H60 or H80 if you're on a budget, H100 or H100i if you're willing to spend.
what is the difference between the H100i and the H100?
H100i is better overall. Not much price difference, I think. Noctua NH-D14 is an air cooler but it is actually really good, it competes with high-end liquid coolers.
NOTE: With all CPU coolers I mentioned, first check if they fit in your case before purchasing.