The great thing about your post is that you are focusing on what is good about option A, versus what is good about option B. Much better than dwelling on the negatives, and it will make it easier to decide if you are looking at them in a positve way.
I think it is very helpful to try on both hats. Walk around for a week thinking to yourself "I will be having surgery next month." Then the next week walk around thinking "I will be having radiation next month." See which hat fits better.
I had balance testing, including ENG, VEMP, and ABR, a nerve response test. They can provide useful information about the status of the balance and hearing nerves, that may help in choosing an appropriate treatment.
They are easy to go through. In one test,they put hot and cold water in your ear, and video your eye movements with special goggles. They made me name things by the alphabet (Akron, Boston, Chicago, Detroit...) to keep my mind from overriding the eye responses - or maybe just to humiliate me when I got stuck on a letter.
Keep up the great attitude, it is helpful to others (like me, for instance).