Yes, it's a good thing being HPV-16 positive in the oropharynx, which usually responds better to treatment, and has better prognostics all across the board. If you smoked, you can be at risk of a more aggressive HPV sub type that behaves more like non HPV, but that may depend on the number of pack years smoked, and deescalation of treatments may not be advised then.

Tomotherapy is a form of IMRT with CT imaging that radiates slice by slice around the patient in a CT like machine, which may be more conformal, have less side effects, take less time to radiate than IMRT. It's usually good for moving tumors such as in the lungs, and tumors close to vital structures like the brain stem, whereby a CT scan is taken each time before treatment, conforms to the tumor as it gets smaller as opposed to IMRT that usually takes one CT before treatment in a separate machine. A few here had Tomotherapy, and posted a topics on the subject if you look under the search feature, but I haven't seen much about Tomotherapy in recent years vs IMRT, maybe due to Proton Therapy being more readily availability, and more targeted, and then there is IMGT, Image Guided Radiation Therapy too.

You've already heard about Moffitt, and 2nd what was said about Dr. Harrison.

Good luck