Daniel, I'm not good in the solace department but my heart goes to you.
I would strongly suggest one of two things:
Don't go to the Judicial Committee at all unless you're prepared to do the following
Before I recommend what you should do let me say that I realize you have your speech all made up in your head. Don't bother. I suggest the following if you want to vent your frustrations. Take a good friend that is not involved in the JWs for your protection, as well as an audio recorder, and...
Before a single elder even opens his mouth, address them by screaming at the top of your lungs and saying something like "You are the apostates!!! You..." You should startle them with the unexpected and more importantly take control of the situation by pre-empting them.
Then, even though your wife is the most important thing in your life don't bring it up until the end of your screaming speech. Frankly they don't give a damn and will simply blame you for the situation. Instead start with a litany of the crimes, against their members, that the organization has commited. Use only the ones that their doctrinally brainwashed minds cannot rationalize, even though they try.
You need to take the moral high ground and hit them fast and strong with moralistic outrage loud enough to either shock them into silence or at least drown out their voices. My suggestion, and I know it's one of my pet peeves, is to start with their disfellowshipping of teenage girls for revealing their molesters to the police. Then keep yelling on and on about all the abominantions that they commit on behalf of the Organization.
By doing this, you will be venting your frustrations and actually feel somewhat less stressed afterwards.
Whatever they do, don't let them take control of the situation by even addressing themselves to you. And absolutely do not even think of a back and forth exchange no matter how confident you feel about how you will respond to them. It simply will not affect them; you won't win that way. Only by shocking the bejesus out of them with a sudden and unexpected outburst of great strength can you impress them.
Whatever you do I wish you luck.
Villabolo