in my experience not so much. I have not used a nice high quality fan but adding the second fan for a push pull only really allowed to keep the fans at a lower lvl and make it more quiet. it did help a little as i pushed over the 1.5v on my 2500k @5GHz but that is really just the thermal dissipation limit of this cooler.
remember to select a best answer. forum contributors always appreciate it
I'd go with different fans than the sickle. In short your EVO will run your CPU cooler with the upgraded fans. Both of the options below are VERY quiet and I would definitely run the push/pull if it can fit.