The H100i includes the SP 120s which is what makes it so much more better than the H100.
And their suggestion is to do a pull from outside into the case. I set mine up like that in my 500R and so far my 4670K doesn't push past 55c at full load at stock settings. Haven't tried overclocking yet though.
Put having it pull air in makes sense as it will pull cooler air through the radiator than what is traveling through your case from the front.