Hi elderbirds,
Doctors with strong opinions? Yes, I think you will run into that quite often in the medical business. Very few of them of are shy.
I had the ABR and ENG tests, and it was fine - in fact, more pleasant that a typical morning at work.
The woman conducting the tests was very careful and courteous. The ABR was easy, they put a headphone on that clicks in your ear, with some wires on you. The ENG test I had was also the one with the goggles on to video my eye movements while I followed dots or they put water in my ears. Watching the video after was fun, it just showed the two eyes, no nose in between, so it looked quite funny. The tests are useful for determining what kind of function your hearing and balance nerves have.
My impression is that the neurosurgeons tend to favor retro-sigmoid, while the neurotologists favor the trans-lab approach - I wonder if that is what you found? At least they are giving you some choices, sometimes people just get told one thing and have nothing else to go on. I suspect that as you continue your consultations, and find more information, and get a chance to think it over, one of the choices will begin to emerge as the one for you. Just give it a little time.
Best wishes, Steve