Ive done research between the Hyper 212 Plus vs EVO, and Ive heard theres practically no difference, 1-3C diff if any.
Ive read people that can oc to 5ghz on it, I doubt from the ranges Ive heard, but 4.5ghz seems pretty do-able.
For me the Plus was 20-25, and the EVO 30-35$
Up to you, you could probably replace them without worry.
the only real difference between the two is the fan thats on it.