Your H said "he said "so do you think that she can help me get rid of some of this anger?" ....the C will help him to understand what was going on with you better, which I believe will help possibly to diffuse some of the anger....understanding is a great tool!
Don't be worried about the counseling...sure it's natural to be nervous, but go into it with an open mind....and utilize the counselor as a tool to get your M back on track.
Also, don't be surprised if you find yourself getting emotional in his/her office...that happens, go with it...feel what you need to feel, get it out! Both of you are bound to have pent up emotions...this is definitely the time/place to deal with those emotions.