Cool man. What kind of thermal paste are you using?
Once you are satisfied the mount is good it is recommended to test your thermal envelope by downloading and running Prime95
version 26.6, choose the Small FFT option and run for 15 minutes. If peak temp remains below 80°C then you are thermally compliant.
I would use Core Temp or HWinfo to monitor thermal activity.
HWinfo is great for pretty much EVERYTHING, including CPU thermals, core loads, core temps, package temps, GPU sensors, HDD and SSD sensors, motherboard chipset and VRM sensor, all of it. Always select the "Sensors only" option when running HWinfo.
*Download HWinfo
For temperature monitoring only, I feel Core Temp is the most accurate and also offers a quick visual reference for core speed, load and CPU voltage:
*Download Core Temp