I sympathize with the sentiment, but I just think it's going to be more destructive and you're married. And especially since you think you could move forward. Trust me he won't be able to get over that so probably that would be the end. But then just him cheating might ought to be the end because I don't see how you're going to be able to trust anymore.
If you want to try to preserve your marriage and work on it and he's willing to work on it maybe with a marriage counselor, don't do it. If you are done with your marriage I would just advise try to be the classy one and file papers before you do it at least. Don't do something that you yourself don't approve of!