Thermal paste? What are you expecting? Some kind of break through compound that they couldn't have already figured out between 1960 and 2015? TheGleaner, You are overthinking this way to much. Any thermal paste you get will be within 1-2 degrees.
I use Artic Silver 5, but when I run out I've used cooler master's, phanteks, some no name brands... No difference.
So any of them will do