AO,
I do think that Bigger and other posters have made a very good point about what an advantage you have in being able to assemble a body of evidence that can then be used to gauge how honest your wife is after you begin to ask questions. And being able to discern how honest your wife is will have a huge bearing on whether or not she is a suitable candidate to consider reconciling with. And that is presuming you open to reconciliation in the first place; this might all be a deal-breaker for you.
This actually has a parallel with another live thread at the moment, in which the betrayed spouse has proof of a more than a hundred phone calls and messages to an OM over a three-year period, while his WW keeps insisting she contacted the OM ten times or less in that period.
Bigger is spot on when he states that taking this approach requires a strong constitution, because as the poster in the thread that I mentioned is finding, it can be very disheartening to find a spouse swearing that their lies are true, and you have to say nothing about all the evidence you have that contradicts what they say. However, if you can get through this process, it really will provide you with a way to test your wife's suitability if reconciliation is a possibility. And that is something that a lot of people never have in the aftermath of infidelity.
At the same time, you must bear in mind that very few people are going to feel able to admit to everything that they did or said, particularly some of the most hurtful elements. If you put yourself in her position, and she was asking you about what you said to another woman about her, would you really be able to say, "I said she had better boobs, was better in bed, etc"? It is incredibly hard to confess to things like that, and your wife may well deny those things repeatedly.
Those things, I would say, are peripheral to the core issues, though at some point, when you have taken what you need from the process, you can print various items of your evidence and give them to your wife in a folder, so that she knows that you have seen them. If you do that, without any big scene or lots of comment, I think it would actually increase the impact of the evidence. Let her re-read what she did and said, and let the knowledge that you know about it sink in.
I say that not in any malicious way, but because she needs to properly grasp how much work she has to do if she is going to redeem herself and make things up to you. If she develops that frame of mind, it can be the basis for a realistic beginning to reconciliation.
Unless there is honesty from her, and true remorse, reconciliation is likely to fail at some point in the future. It can be hard road to embark upon, which is why, even though some of this stuff sounds harsh, it is better for you in the long term to stress-test as much as possible before you commit to any potential way forward. It will mean that you do not commit to a reconciliation that may well fail, but it also means that if you take the decision to divorce, you will not have done it without first exploring whether reconciliation had the potential to work.
This is just food for thought; if any of it is useful, that is great, but if anything here does not feel suitable for you, please reject it. You are the guy who best knows your mind, and which outcomes you may be thinking about.