Suing a woman who has a psychiatric record, and who has already been found by a jury to have created a rape story against this man (or at least, where the man has been found not guilty of rape based on the evidence presented), seems a bit nonsensical to me. The costs stand to outweigh any benefits that could be realized - and this includes the costs to the guy's reputation, which will take a further battering in any new court action.
But, it is the guy's money and I can certainly understand his desire to "get back" at this woman for her false accusation. False accusations of this sort are especially harmful. The man just needs to understand that his reputation will not be repaired by a defamation suit, it could be additionally injured, and the damages he is awarded (if any) may not offset the monetary costs he incurs in pursuing an action.
He should speak with his attorney and go over all facts, both the pros and the cons of a suit, and then determine from this what his best course of action may be. Again, he should have all past police and court records expunged, as these will show up on background checks.
