I saw all four nominated shows. They each have their own good points.
The thing about Spamalot is, if you don't like Monty Python, chances are you won't like the show. It's the movie Monty Python and the Holy Grail transferred to stage with filler material added. It is without questions very well done. There are very talented people involved and there is a professional sheen about the production that comes from experience and hard work. I laughed and had a good time. I don't regret seeing the show at all. That being said, it is not my favorite of the four shows and I won't return to it any time soon.
Many people in the audience know all the material before it happens and they screech with laughter at the entrance of a certain character before anything is even said because they know what will happen. I find that just a bit annoying.
The number shown on the Tonys did absolutely NOTHING (IMHO) to show the silly, crazy and off-the-wall moments in the show. If I had not seen the show already, that number would not make me want to see it, especially if I knew it would cost me anywhere from $101.25 for the Orchestra or Mezzanine to $76.25 for the front balcony or $36.25 for the Rear Balcony (if you have a fear of heights and no binoculars avoid that choice). The .25 cent charge is part of the $1.25 Theatre Restoration Fee included in the price of almost all Broadway tickets sold nowadays.
That may not answer your question but those are some random thoughts about the steamroller called Spamalot