If the push pins are well made they're fine, its only when you get the shitty stiff ones that you need to apply over 9000! units of newton force in order to get the pins through that are shite balls XD
At guy above, my xig 1283 beat my true 120 x by 5 c under-load on the CPU in my system specs same case but no water-cooling obviously
its all about choosing the right fans for the right heatsink.
For example the cooler you metnioned ( thors hammer) would probably benefit from high pressure fans such as Scyth gentle typhoon.
Thermal-rights coolers are over rated and not worth the pennies in my opinion ( only got mine as it was second hand)