Scotty W.,
Pizza, in my experience, will be as complicated as you are willing to make it. There are several overarching types of pizza and then a myriad of variations under those main types. I hesitate to recommend a blanket stone because each type of pizza needs a different cooking environment. I guess it depends on how serious you want to get about making pizza.
For examples, a New York Style pizza will bake best on a 1/2 inch steel plate in a residential oven, a Neopolitan pizza is almost impossible to achieve in a residential oven but will need a stone in the event you want to try, a cracker style crust (like Pizza Hut's Thin & Crispy) is baked in a cutter pan, usually on no stone at all, a deep dish or Detroit Style or Sicilian style is baked in a special pizza pan, sometimes on stones, sometimes not. The rabbit hole of pizza making is really deep.
That being said, the stone I have is a Fibrament 16" round stone and have been very happy with it. But I am trying to perfect a NY style pizza so I am looking at a steel plate at the moment. If you have any more questions, please ask. I love to talk pizza.