Liz, as you know, Buzz had modified radical neck disection,then eight weeks later began IMRT & chemo. I assumed that this procedure was standard. Early on in my research, I became extremely concerned due to the diverse treatment plans I was seeing. However, I could never get a straight answer from Buzz' surgeon as to why he performs surgery first.
Another forum member went to the same doctor, got the same recommendation, but chose to go to another hospital, where no surgery was done, only chemo & radiation. Last I heard, he was doing well.
Personally, it is my belief that Buzz would have never survived surgery following IMRT/chemo due to the insuing weakness, weight loss and severe depression, among other complications.
EVERYONE is different, and I think it comes down to fully trusting your doctors.
Bottom line with Buzz, he was in much better position, physically and emotionally to have surgery first.
GOOD LUCK TO YOU!

Lois & Buzz in NC