It does seem he has a good chin but I want to see it tested more before we can say its great. Gomi has a really good chin. Henderson has a good chin. Tim Sylvia's chin is pretty good and he has good recovery. Even though he got KO'ed quickly recently Hunt. I would like to say Nog too but sadly it looks like his punch resistance is now fading.
Although hes been dropped a couple times Nick Diaz has a iron jaw dude took tons of clean shots from a heavy handed Joe Riggs who weighed in at like 190 that night.
-Cabbage was awesome against Arlovski (meaning he took punishment well) -Fitch is quite durable too in the chin dept.
Mark Hunt. Took a Cro Cop head kick and jumped straight up. Recently KO's by a middleweight, proving anyone can be parked.
A silva!! even though he doesnt take many punches. When he does he just walks right through them never seen him hurt i remember when he fought rich it was almost like he wanted rich to hit him.