Serial cheater?

My husband has been lying and cheating all throughout our marriage, i've confronted him and he always denies. This last affair is the last straw and I have filed for a divorce. Now he is repentant, apologises for all the hurt and pain he has caused me and wants to try counselling and reconciliation. He wants to explore the reasons he does what he does, what he is searching for. Unfortunately I still care for him but I am sensible enough to know I can't continue like this. My H says the thought of divorce has given him the kick up the backside he always needed and he doesn't want to lose me Incidentally he stands to lose a lot financially if this happens. Should I give it one last try or should i just get on with the divorce? Apart from the cheating aspect, he is a kind and generous man and we hold a lot in common. Our families are trying to keep us together as well as the children. My head is all over the place. Any one with an opinion on this?