My pizza oven works great as an oven. My smoker works great as a smoker. They are different, and have different goals. Sometimes when you combine functions into one unit, you get something that is not really as good as it should be at either task.
Build a pizza oven, then build a smoker. Two is better than one.
[SIZE=3][SIZE=2]Wood fired pizza oven,Copper Weber Gold, Green Weber Performer, Black Weber Silver, Green logo'd 18 inch Weber Gold, and a UDS of course.