There has been much said about MRI's many times the spine is not infringed. Just remember MRi results are of a person relaxed in a still position. It does not take into account what happens when you are moving when discs etc could press on spine/nerves. Many decades ago if you had an ulcer it was stress.Now we know this is rubbish.
There is a new MRI in the States that rather than a fixed position it produces an MRi video so any problems that occur when body moves would show nerve inpingement.
Another interesting tool which top world hospitals use is thermograms  Thermongrams work on basis of showing temprature and pain produces chemicals that make heat potentially even burn you producing blisters.
There is another development of a nerve microscope which shows specific problems,
I am in the UK and there is a basis tendancy for Spinal Surgeons not to diagnosis in areas where and operation is very risky.This means you will never have a fully informed picture for you to make a decision.
I have ahd 3 ADR discs.