Why do you need a new CPU cooler? The stock one will do just fine.
The TX3 EVO is a pretty good cooler. My friend has one and it keeps his AMD Athlon X4 760K really cool,at 25-30C at idle and 50-55C when gaming.
He is also using Arctic Silver MX4 for the Thermal Paste,which also helps drag the heat away more efficiently.
All the best.