I'm not as big of a fan of couseling as most here. I think it can be beneficial to some, but far more important is the motivations and daily actions you and your H have or do.
If saving your M is extremely important to both of you, my suggestion would be to ditch the IC and go with an MC that would also do some digging to find out "why" he went down that road, and look for ways to prevent it from happening again, at the same time as giving you both tips to rebuild your M, and cope with what happened (the A).
As for me, my H had as many FOO issues and other mental issues as anybody else, that helped lead down the path to what happened. We have talked about it ourselves, and I believe he has learned ways to avoid falling into anything like that again. But with or without counseling (he did neither IC nor did we do MC) I know only know one thing... I can only control myself. If he should ever cheat again, I would divorce him at record speed. He knows this but it would not really matter whether he knows it or not; I still know what I would do and no amount of begging or pleading would change my mind. We all say we never know what we will do until we are in a situation. Well, I am 54 and I do know when I get to certain points, yes I do what I say I will. I warned my XH what I would do if he cheated again, and when that day came, I filed for a D two days later and never looked back. It would have been even sooner than that if I could have gotten the appointment with the lawyer sooner.