Maybe I've owned and built hundreds of computers?
Trust me, you're doing it far to early to notice a difference, I am all with o'c, but not at a stage where you will not notice a thing.
This is my own opinion, and from my very own education, I suggest this, but if you really want to, go ahead, but please come back and let me know how it goes, then atleast it'll put a smile on my face.
And for the record, I've been here for quite along time and I've never 'bought' an intel cpu, and I've bought a few AMD's, and yes I do have a different heatsink from stock, cost me £25, what did it do to my temps
A company as big as AMD will not release a 'dodgy' heatsink, I can a sure you this.