Dead & Gone I assume you've swapped the fans on the H-100, If yes what did you get? what direction do you have the air flow in the H100? & How much did you over-clock on your I5?
(sorry for the barrage of questions)
To OP, I've got an H100 and before I chose my HAFX I was 99% committed to a 550 and know it will fit, though D&G will have to confirm if he leaves the "roof" (top plate) open or not as I didn't think the 550 would be good for air flow (so chose the HAFX)