Is it that much important to have a cooler?



Hi. If you are not OCing, then as a rule the stock cooler should be fine.
 
The stock is fine, but I would still recommend you buying a cooler.

Why?
1) You can sell the stock cooler later
2) Your CPU will be much cooler while and when you don't play video games.
3) It'll extend your CPU's life by a bit.
4) It's cheap.
 


LOL. Maybe if someone's stock cooler breaks, or stops working and they don't want to invest in a $25 cooler, they can buy a stock for like $5. I've seen it on sites. :)