An ARCTIC Freezer 34 eSports DUO would be a good reasonably priced choice for a 3600.
Amazon.com: ARCTIC Freezer 34 eSports DUO - Tower CPU Cooler with BioniX P-Series case fan in push-pull, 120 mm PWM fan, for Intel and AMD socket - White: Computers & Accessories
I have one on a 2600 and it...